1990 Toyota Corolla

1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

1984-94 AUTOMATIC TRANSMISSIONS

General Motors Corp. - Toyota A-131L & A-132L

APPLICATION
TRANSAXLE APPLICATIONS
Application Transaxle
Chevrolet 1988 Nova A-131L
Geo 1989-94 Prizm A-131L
Toyota
1984-87 Corolla A-13OL or A-131L
1988-94 Corolla A-131L
1988-94 Tercel A-132L

IDENTIFICATION
This transmission may be manufactured by either Aisin Warner or Toyota. On Geo Prizm, transaxle
identification number is located near transaxle rear cover. On Corolla, transaxle identification number is located
on converter housing (Aisin Warner), or on top of transaxle case, near carrier cover (Toyota). On Tercel,
transaxle identification number is located on top of transaxle case near carrier cover (Toyota). See Fig. 1 -Fig.
3.

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06:32:17 p. m. Page 1 © 2011 Mitchell Repair Information Company, LLC.
 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 1: Locating Transaxle Identification Number (Prizm)

Courtesy of TOYOTA MOTOR SALES, U.S.A.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 2: Locating Transaxle Identification Number (Aisin AW A-131L)

Courtesy of TOYOTA MOTOR SALES, U.S.A.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 3: Transaxle Identification Number (Toyota A-131L & A132L)

Courtesy of TOYOTA MOTOR SALES, U.S.A.

DESCRIPTION
Transaxles have 3 forward speeds and reverse. Transaxle assembly consists of torque converter, oil pump,
control valve assembly, differential, input shaft, intermediate shaft, 2 planetary gear sets, forward clutch, direct
clutch and 2 one-way clutches. See Fig. 4 .

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 4: Identifying Transaxle Component Locations

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

LUBRICATION & ADJUSTMENTS

See appropriate AUTOMATIC TRANSMISSION SERVICING article:

1988 Nova: TRANSMISSION SERVICING - A/T

1989-91 Prizm: TRANSMISSION SERVICING - A/T
1992-94 Prizm: TRANSMISSION SERVICING - A/T
1989-91 Corolla & Tercel: TRANSMISSION SERVICING - A/T
1992-94 Corolla & Tercel: TRANSMISSION SERVICING - A/T

ON-VEHICLE SERVICE
DRIVE AXLE SHAFTS

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

For axle shaft service, see appropriate AXLE SHAFTS article in DRIVE AXLES:

For 1991 Prizm, see AXLE SHAFTS - FRONT

For 1992 Prizm, see AXLE SHAFTS - FRONT
For 1991 Corolla & Tercel, see AXLE SHAFTS - FRONT
For 1992 Corolla & Tercel, see AXLE SHAFTS - FRONT

DIFFERENTIAL SEALS

Removal

Raise and support vehicle. Measure distance between side gear shaft and case and record measurement. Remove
axle shaft. See appropriate AXLE SHAFTS article in DRIVE AXLES:

For 1991 Prizm, see AXLE SHAFTS - FRONT

For 1992 Prizm, see AXLE SHAFTS - FRONT
For 1991 Corolla & Tercel, see AXLE SHAFTS - FRONT
For 1992 Corolla & Tercel, see AXLE SHAFTS - FRONT

Using Seal Remover (09308-00010), remove oil seal.

Installation

1. Using Seal Installer (09350-32013), install seal in transaxle case. Seal must be even with case surface.
Coat seal lip with grease. Using Side Gear Installer (09520-32011), install inside gear shaft until it
contacts pinion shaft.
2. Ensure side gear shaft has .078-.118" (2.00-3.00 mm) play in axial direction. Measure distance between
side gear shaft and case. Measurement should be same as that obtained prior to removal. Install axle shaft
on steering knuckle and side gear shaft. Fill differential with proper fluid.

GOVERNOR ASSEMBLY

Removal

Remove transaxle dust cover. Remove left axle shaft. Remove bracket bolts, bracket, governor cover and "O"
ring. Remove governor body, washer and thrust washer. Remove governor body adapter.

Installation

To install, reverse removal procedure. Install NEW gasket and tighten bracket bolts to 115 INCH lbs. (13 N.m).

THROTTLE CABLE

Removal

Disconnect throttle cable from throttle linkage. Disconnect transaxle control cable from manual shift lever.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Remove manual shift lever. Remove neutral safety switch. Remove control valve assembly. See CONTROL
VALVE ASSEMBLY under ON-VEHICLE SERVICE. Remove throttle cable bolt and retaining plate. Pull
throttle cable from transaxle case.

Installation

1. Install throttle cable in transaxle case. Ensure cable is fully seated. Install retaining bolt and plate. Install
control valve assembly. On NEW throttle cables, stopper must be staked on inner cable. Bend cable in
approximately a 7.87" (200 mm) radius.
2. Pull inner cable lightly, until a slight resistance is felt, and hold in place. Stake stopper on inner cable,
leaving a .031-.059" (.78-1.49 mm) gap between cable housing and stopper. See Fig. 5 .

Fig. 5: Locating Throttle Cable Stopper

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3. Adjust throttle cable and neutral safety switch (if necessary). See appropriate AUTOMATIC
TRANSMISSION SERVICING article:
1988 Nova, see TRANSMISSION SERVICING - A/T
1989-91 Prizm, see TRANSMISSION SERVICING - A/T
1992-94 Prizm, see TRANSMISSION SERVICING - A/T
1989-91 Corolla & Tercel, see TRANSMISSION SERVICING - A/T
1992-94 Corolla & Tercel, see TRANSMISSION SERVICING - A/T

Install manual shift lever. Install transaxle control cable. Test drive vehicle.

CONTROL VALVE ASSEMBLY

CAUTION: Note control valve assembly bolts length and location. Proper length bolts
must be installed in correct locations to prevent transaxle case damage.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Removal

1. Raise and support vehicle. Clean exterior of transaxle oil pan. Drain transaxle fluid. Remove oil pan and
gasket. Remove strainer and oil tube bracket. Note location of oil tubes. Using large screwdriver, remove
oil tubes.
2. Remove detent spring. Remove manual valve and manual valve body. See Fig. 6 . Note bolt length and
location. Remove control valve assembly bolts. See Fig. 7 . Remove throttle cable. Remove control valve
assembly. Remove governor oil strainer. Remove governor apply gasket. See Fig. 11 .

Installation

1. Install governor apply gasket. Install governor oil strainer. Hold valve body cam downward. Install
throttle cable in slot. Install control valve assembly. Ensure kickdown switch wire is not under valve
assembly. Install control valve assembly bolts finger tight. Ensure bolts are installed correctly. See Fig.
7 . Tighten bolts to 89 INCH lbs. (10 N.m).
2. Align manual valve with pin on manual shift lever. Install manual valve body. Install manual valve body
bolts and tighten to 89 INCH lbs. (10 N.m). Install detent spring and tighten bolts to 89 INCH lbs. (10
N.m). Ensure manual valve lever contacts center of roller on detent spring. Using a plastic hammer, tap
oil tubes into place. Install oil tube bracket. Tighten bolts to 89 INCH lbs. (10 N.m).
3. Install oil strainer. Tighten bolts to 89 INCH lbs. (10 N.m). Install magnets in oil pan. Ensure magnets do
not interfere with oil tubes. Install oil pan and gasket. Tighten bolts to 43 INCH lbs. (4.9 N.m). Fill
transaxle with fluid.

Fig. 6: Identifying Manual Valve Body Bolts

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 7: Identifying Control Valve Assembly Bolts

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

TROUBLESHOOTING
PRELIMINARY CHECKS

Automatic transaxle malfunction can be caused by either engine or transaxle. Isolate malfunction to engine or
transaxle before proceeding with trouble shooting. Prior to trouble shooting, check and adjust throttle cable,
shift linkage, neutral safety switch and idle speed RPM as necessary. Ensure fluid level is correct. Check tires
for correct inflation.

SYMPTOM DIAGNOSIS

Fluid Discolored Or Smells Burnt

Contaminated fluid, faulty torque converter or transaxle assembly.

No Movement In Any Gear Position

Shift cable out of adjustment, faulty control valve assembly, primary regulator, parking lock pawl, torque
converter or transaxle assembly. Broken converter drive plate or blocked oil pump intake screen.

Selector Lever Position Incorrect

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Shift cable out of adjustment, faulty manual valve and lever or transaxle assembly.

Harsh Engagement Into Any Forward Gear Position

Throttle cable out of adjustment, faulty control valve assembly, primary regulator, accumulator pistons or
transaxle assembly. See CLUTCH & BAND APPLICATION table.

Delayed Upshifts, Or Downshifts From 3-2 Then Shifts

Back To 3rd

Throttle cable out of adjustment, faulty control valve assembly or governor assembly.

Slips On Upshift, Or Slips Or Shudders On Acceleration

Shift cable or throttle cable is out of adjustment, or there is a faulty control valve assembly or transaxle
assembly. Refer to the CLUTCH & BAND APPLICATION table.

Drag, Binding Or Tie-Up On Upshifts

Shift cable out of adjustment, faulty control valve assembly or transaxle assembly.

No Lock-Up

Faulty control valve assembly, torque converter or transaxle assembly.

Harsh Downshift

Throttle cable out of adjustment, faulty control valve assembly or transaxle assembly.

No Downshift When Coasting

Faulty control valve assembly or governor assembly.

Downshift Occurs Too Soon Or Too Late While Coasting

Throttle cable out of adjustment, faulty control valve assembly, transaxle assembly or governor assembly.

No 3-2 Or 2-1 Kickdown

Throttle cable out of adjustment, faulty control valve assembly or governor assembly.

No Engine Braking In 2nd Or "L" Position

Faulty control valve assembly or transaxle assembly.

Vehicle Does Not Hold In "P" Position

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Shift cable out of adjustment, faulty parking lock pawl cam and spring.

CLUTCH & BAND APPLICATION

Selector Lever Position Elements In Use
"D" (Drive)
First Gear Forward Clutch & No. 2 One-
Way Clutch,
Second Gear Forward Clutch, No. 1 One-
Way Clutch & Second Brake
Third Gear Direct Clutch, Forward Clutch
& Second Brake
"2" (Intermediate)
First Gear Forward Clutch & No. 2 One-
Way Clutch
Second Gear Forward Clutch, No. 1 One-
Way Clutch, Second Brake &
Second Coast Brake Band
"L" (Low)
1st Gear Forward Clutch, No. 2 One-
Way Clutch & 1st & Reverse
Brake
Second Gear (1) Forward Clutch, No. 1 One-
Way Clutch, Second Brake &
Second Coast Brake Band
"R" (Reverse) Direct Clutch & 1st & Reverse
Brake
"N" Or "P" (Neutral Or Park) All Clutches & Bands Released
Or Ineffective
(1) Downshift in "L" position, Second gear only. No upshift.

TESTING
ROAD TEST

NOTE: Perform test with fluid at normal operating temperature of 122-176°F (50-80°C).

"D" Position Test

1. Shift vehicle into "D" position. While driving vehicle, hold accelerator constantly at full throttle position.
Check 1-2 and 2-3 upshift points. Refer to appropriate table under SHIFT SPEED SPECIFICATIONS .
If 1-2 upshift does not occur, 1-2 shift valve is stuck or governor valve is defective.
If 2-3 upshift does not occur, 2-3 shift valve is stuck.
If all shift points are incorrect, throttle cable is out of adjustment or throttle valve, 1-2 or 2-3 shift
valves are defective.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

2. Repeat procedure and check shock and slip during 1-2 and 2-3 upshifts. Excessive shock can be caused
by excessive line pressure, defective accumulator or defective check ball.
3. While driving vehicle in "D" position, check for abnormal noise or vibration. Abnormal noise or vibration
may be due to an unbalanced axle shaft, differential, tires or torque converter.
4. While driving vehicle in 3rd gear, confirm correct kickdown speed limits for 3-2 and 2-1 shift points.
Check for abnormal shock or slip at kickdown. If kickdown speed limit is incorrect, throttle cable is out
of adjustment or throttle valve, 1-2 or 2-3 shift valves are defective.
5. Drive vehicle in "D" position. Release accelerator pedal and shift into "L" position. Confirm correct
downshift speed limits for 2-1 shift point.

Lock-Up Mechanism

Drive vehicle in the "D" position with the lock-up on and maintain vehicle at the specified speed. Refer to
LOCK-UP SPEED SPECIFICATIONS . Lightly depress accelerator pedal. Ensure engine RPM does not
change abruptly. Large increase in engine RPM indicates lock-up function is faulty.

"2" Position Test

While driving vehicle in "2" position, release accelerator pedal and check engine braking effect. If no engine
braking occurs, 2nd coast brake is defective. Check for abnormal noise during acceleration and deceleration.
Check for shock during upshift and downshift.

"L" Position Test

While driving vehicle in "L" position, ensure upshift to 2nd gear does not occur. Release accelerator pedal. If
engine braking does not occur, 1st and reverse brake are defective.

"R" Position Test

Shift vehicle to "R" position. Accelerate vehicle from a stop to full throttle. Ensure slipping does not occur.

"P" Position Test

Stop vehicle on slight incline. Shift vehicle to "P" position. Release parking brake. Ensure parking lock pawl
holds vehicle.

SHIFT SPEED SPECIFICATIONS

COROLLA SHIFT SPEED SPECIFICATIONS (3.526 GEAR RATIO) (1)

Application MPH
"D" Position
1-2 33-43
2-3 63-73
3-2 60-71
2-1 24-30
25-32

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

"L" Position (2-1) (2)

(1) Wide open throttle.

(2) Fully closed throttle.

COROLLA SHIFT SPEED SPECIFICATIONS (3.722 GEAR RATIO) (1)

Application MPH
"D" Position
1-2 31-40
2-3 60-70
3-2 57-68
2-1 22-29
"L" Position (2-1) (2) 24-30
(1) Wide open throttle.

(2) Fully closed throttle.

NOVA SHIFT SPEED SPECIFICATIONS (3.526 GEAR RATIO) (1)

Application MPH
"D" Position
1-2 33-43
2-3 63-73
3-2 60-71
2-1 24-30
"L" Position (2-1) (2) 25-32
(1) Wide open throttle.

(2) Fully closed throttle.

NOVA SHIFT SPEED SPECIFICATIONS (3.722 GEAR RATIO) (1)

Application MPH
"D" Position
1-2 31-40
2-3 60-70
3-2 57-68
2-1 22-29
"L" Position (2-1) (2) 24-30
(1) Wide open throttle.

(2) Fully closed throttle.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

PRIZM SHIFT SPEED SPECIFICATIONS (3.722 GEAR RATIO) (1)

Application MPH
"D" Position
1-2 29-39
2-3 58-67
3-2 54-66
2-1 23-29
"L" Position (2-1) 23-30
(1) Wide open throttle.

TERCEL SHIFT SPEED SPECIFICATIONS (1)

Application MPH
"D" Position
1-2 32-40
2-3 61-69
3-2 57-66
2-1 22-28
"L" Position (2-1) 25-30
(1) Wide open throttle.

LOCK-UP SPEED SPECIFICATIONS

COROLLA LOCK-UP SPEED SPECIFICATIONS (3.526 GEAR RATIO) (1)

Application MPH
"D" Position (2)
Lock-Up ON 44-50
Lock-Up OFF 41-47
(1) Fully closed throttle.

(2) There is no lock-up in "L" or "2" position.

COROLLA LOCK-UP SPEED SPECIFICATIONS (3.722 GEAR RATIO) (1)

Application MPH
"D" position (2)
Lock-Up ON 42-47
Lock-Up OFF 39-44
(1) Fully closed throttle.

(2) There is no lock-up in "L" or "2" position.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

NOVA LOCK-UP SPEED SPECIFICATIONS (1)

Application MPH
"D" Position (2)

Lock-Up ON 44-50
Lock-Up OFF 41-47
(1) Fully closed throttle.

(2) There is no lock-up in "L" or "2" position.

NOVA LOCK-UP SPEED SPECIFICATIONS (1)

Application MPH
"D" position (2)

Lock-Up ON 42-47
Lock-Up OFF 39-44
(1) Fully closed throttle.

(2) There is no lock-up in "L" or "2" position.

PRIZM LOCK-UP SPEED SPECIFICATIONS (3.722 GEAR RATIO) (1)

Application MPH
"D" Position (2)

Lock-Up ON 32-37
Lock-Up OFF 29-34
(1) Fully closed throttle.

(2) There is no lock-up in "L" or "2" position.

TERCEL LOCK-UP SPEED SPECIFICATIONS (3.722 GEAR RATIO) (1)

Application MPH
"D" Position (2)
Lock-Up ON 48-52
Lock-Up OFF 45-69
(1) Fully closed throttle.

(2) There is no lock-up in "L" or "2" position.

TERCEL LOCK-UP SPEED SPECIFICATIONS (4.058 GEAR RATIO) (1)

Application MPH
"D" Position (2)
Lock-Up ON 29-33
Lock-Up OFF 26-30

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

(1) Fully closed throttle.

(2) There is no lock-up in "L" or "2" position.

STALL SPEED TEST

1. Operate engine and transaxle at normal operating temperature. Connect tachometer to vehicle and ensure
it is visible to the driver. Apply parking brake and block front and rear wheels.

CAUTION: DO NOT maintain stall speed RPM for more than 5 seconds.

2. Start engine, apply brakes and place transaxle in "D" position. Depress accelerator to full throttle and note
maximum RPM obtained. Repeat test in "R" position. For stall speeds, refer to the STALL SPEED
SPECIFICATIONS table.

STALL SPEED SPECIFICATIONS

Vehicle Transaxle RPM
Corolla A-131L 2200-2500
Nova A-131L 2200-2500
Prizm A-131L 2050-2350
Tercel A-132L 2200-2600

Stall Speed Test Results:

Stall Speed Same In Both Positions, But Less Than Specified

Insufficient engine output or defective stator one-way clutch.

NOTE: If stall speed RPM is more than 600 RPM less than specification, torque
converter may be faulty.

Stall Speed High In "D" Position

Low line pressure, forward clutch slipping or defective No. 2 one-way clutch.

Stall Speed High In "R" Position

Low line pressure or direct clutch or 1st and reverse brake slipping.

Stall Speed High In Both Positions

Low line pressure or improper fluid level.

TIME LAG TEST

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

NOTE: Perform test with fluid at normal operating temperature of 122-176°F (50-80°C).
Wait one minute between tests. Record 3 measurements and use average value.

1. If selector lever is actuated with engine idling, a time lag will be noted before shock can be felt. Apply
parking brake and block front and rear wheels. Start engine and check idle speed. See IDLE SPEED
SPECIFICATIONS .

IDLE SPEED SPECIFICATIONS

Application RPM
Corolla 650-750
Nova 650-750
Prizm 700
Tercel 800

2. Move selector lever from "N" to "D" position. Measure time required for shock to be felt. Time lag must
be less than 1.2 seconds. Repeat procedure, shifting from "N" to "R" position. Time lag must be less than
1.5 seconds.

Time Lag Test Results:

Excessive Time Lag From "N" To "D" Position

Low line pressure or defective forward clutch.

Excessive Time Lag From "N" To "R" Position

Low line pressure, defective direct clutch or 1st and reverse brake.

HYDRAULIC PRESSURE TESTS

CAUTION: Perform tests with fluid at normal operating temperature of 122-176°F (50-
80°C).

Line Pressure Test

1. Remove appropriate transaxle case plug and connect pressure gauge. See Fig. 8 . Block all wheels. Apply
parking brake. Start engine and shift into "D" position. Ensure idle speed RPM is set to specification.
2. Apply service brakes and depress accelerator. Note pressure readings at idle and stall speeds. Repeat test
in "R" position. Compare the measured pressure readings to those listed in the LINE PRESSURE
SPECIFICATIONS table.
3. If pressure is lower than specified, check the throttle cable adjustment. Adjust as necessary. Refer to
appropriate AUTOMATIC TRANSMISSION SERVICING article for adjustment procedure:
Prizm, see: TRANSMISSION SERVICING - A/T
Corolla and Tercel, see: TRANSMISSION SERVICING - A/T

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Repeat pressure test procedure if throttle cable adjustment was necessary.

Line Pressure Test Results:

Line Pressure High In Both Positions

Throttle cable out of adjustment, defective throttle valve or regulator valve.

Line Pressure Low In Both Positions

Throttle cable out of adjustment, defective oil pump, throttle valve or regulator valve.

Line Pressure Low In "D" Position Only

"D" position circuit leaking pressure or defective forward clutch.

Line Pressure Low In "R" Position Only

"R" position circuit leaking pressure or defective 1st and reverse brake.

Fig. 8: Checking Governor & Line Pressure

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

LINE PRESSURE SPECIFICATIONS

Application psi (kg/cm2 )
"D" Position
Idle Speed 53-61 (3.7-4.3)
Stall Speed 131-152 (9.2-10.7)

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

"R" Position
Idle Speed - Corolla 80-107 (5.6-7.2)
Idle Speed - All Others 77-102 (5.4-7.2)
Stall Speed 205-239 (14.4-16.8)

Governor Pressure Test

1. Apply parking brake. Raise and support front of vehicle with safety stands. Remove appropriate transaxle
case plug and connect pressure gauge. See Fig. 8 .

CAUTION: Road test vehicle or use chassis dynamometer to check governor

pressures exceeding minimum vehicle speed specification.

2. Start engine and shift into "D" position. Note the governor pressure at specified speeds and engine RPM.
Refer to GOVERNOR PRESSURE SPECIFICATIONS . Incorrect governor pressure may be caused
by incorrect line pressure, leakage at governor pressure circuit or defective governor valve.

GOVERNOR PRESSURE SPECIFICATIONS

GOVERNOR PRESSURE SPECIFICATIONS (COROLLA)

Engine RPM Speed (MPH) psi (kg/cm2 )
1000 19 5.7-17 (.4-1.2)
1800 34 20-31 (1.4-2.2)
3500 65 54-65 (3.8-4.6)

GOVERNOR PRESSURE SPECIFICATIONS (NOVA)

Engine RPM Speed (MPH) psi (kg/cm2 )
1000 19 5.7-17 (.4-1.2)
1800 34 20-31 (1.4-2.2)
3500 65 54-65 (3.8-4.6)

GOVERNOR PRESSURE SPECIFICATIONS (PRIZM)

Engine RPM Speed (MPH) psi (kg/cm2 )
800 14 10-21 (.7-1.5)
1600 28 19-29 (1.3-2.0)
2400 43 33-44 (2.3-3.0)

GOVERNOR PRESSURE SPECIFICATIONS (TERCEL)

Engine RPM Speed (MPH) psi (kg/cm2 )
Except Puerto Rico
1000 19 7-19 (.5-1.3)
1800 34 21-33 (1.5-2.3)

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

3500 65 60-71 (4.2-5.0)

Puerto Rico
1000 17 7-19 (.5-1.3)
1800 31 21-33 (1.5-2.3)
3500 60 60-71 (4.2-5.0)

COMPONENT TESTS
TORQUE CONVERTER

NOTE: Torque converter is sealed unit and must be serviced as complete assembly.
Perform following tests to check converter condition. Torque converter and oil
cooler lines must be thoroughly cleaned and flushed if transaxle fluid is
contaminated.

ONE-WAY CLUTCH TEST

1. Install turner and stopper of One-Way Clutch Tester (09350-30020) in torque converter. See Fig. 9 .
Turner fits in inner race of one-way clutch. Stopper fits in notch of converter hub and outer race of one-
way clutch.
2. Clutch should lock when rotated counterclockwise, and turn freely when rotated clockwise. If necessary,
clean converter and retest clutch. Replace converter if clutch does not test as described.

Fig. 9: Checking Torque Converter One-Way Clutch

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

DRIVE PLATE RUNOUT TEST

Measure drive plate runout. See Fig. 10 . If runout exceeds .008" (.20 mm), or if ring gear is damaged, replace
drive plate. If installing a NEW drive plate, note position of spacers. Tighten bolts to 61 ft. lbs. (83 N.m).

CONVERTER SLEEVE RUNOUT TEST

1. Temporarily mount torque converter to drive plate. Mount a dial indicator with needle resting on
converter sleeve. See Fig. 11 . Rotate converter. If runout exceeds .012" (.30 mm), ensure converter is
properly mounted to drive plate.
2. If converter is properly mounted and runout exceeds specification, replace torque converter. Mark
position of converter on drive plate to ensure correct installation. Remove converter from drive plate.

Fig. 10: Checking Drive Plate Runout

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 11: Checking Converter Sleeve Runout

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

REMOVAL & INSTALLATION

TRANSAXLE

For transaxle removal and installation procedure, see appropriate TRANSMISSION REMOVAL &
INSTALLATION - A/T article:

1988 Nova: TRANSMISSION REMOVAL & INSTALLATION - A/T

1989-91 Prizm: TRANSMISSION REMOVAL & INSTALLATION - A/T
1992-94 Prizm: TRANSMISSION REMOVAL & INSTALLATION - A/T
1998-91 Corolla: TRANSMISSION REMOVAL & INSTALLATION - A/T
1998-91 Tercel: TRANSMISSION REMOVAL & INSTALLATION - A/T
1992-94 Corolla: TRANSMISSION REMOVAL & INSTALLATION - A/T
1992-94 Tercel: TRANSMISSION REMOVAL & INSTALLATION - A/T
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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

TRANSAXLE DISASSEMBLY
1. Remove oil cooler pipes and unions, manual shift lever and neutral safety switch. Remove filler tube and
dipstick. Remove throttle cable retaining plate. Remove governor cover bracket. Remove governor cover
and "O" ring. Remove thrust washer. Remove governor assembly. Remove plate washer and governor
body adapter.
2. Remove oil pan and gasket. Remove 3 magnets from oil pan. Remove oil tube bracket and oil strainer.
Remove control valve assembly. See CONTROL VALVE ASSEMBLY under ON-VEHICLE
SERVICE. Remove throttle cable from transaxle case. Remove governor apply gasket and governor oil
strainer. See Fig. 12 .
3. Loosen accumulator cover bolts evenly until spring tension is released. Remove cover and gasket. Apply
14 psi (1 kg/cm2 ) of compressed air to oil passage to force pistons and springs from bore. See Fig. 13 .
Using Expander (09351-32050), remove snap ring. Remove 2nd coast brake piston cover. Remove 2nd
coast brake piston and outer return spring.

Fig. 12: Exploded View Of Transaxle Case Components

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 13: Removing Accumulator Pistons & Springs

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

4. Remove oil pump bolts. Using Puller (09351-32061), pull oil pump free from case. Hold input shaft,
grasp pump stator shaft and remove oil pump and direct clutch from transaxle case. Firmly push 2nd coast
brake band into transaxle case. Ensure brake band does not catch on direct clutch drum. Remove direct
clutch and thrust washer from rear of oil pump.
5. Remove forward clutch. Remove race and thrust bearings from forward clutch. Using small screwdriver,
push 2nd coast brake band pin inward and remove from oil pump mounting bolt hole. Remove 2nd coast
brake band. Remove front planetary ring gear. Remove bearing and race from ring gear. See Fig. 14 .
6. Remove front planetary gear. Remove bearings and races from planetary gear. Remove sun gear, sun gear
input drum, 2nd brake hub and No. 1 one-way clutch. Remove 2nd coast brake band guide. Remove 2nd
brake drum snap ring. Remove 2nd brake drum. Remove 2nd brake piston return spring.
7. Remove plates, discs and flange. Note number and location of components. To remove piston from 2nd
brake drum, apply compressed air slightly to oil passage. Remove No. 2 one-way clutch snap ring.
Remove No. 2 one-way clutch and rear planetary gear. Remove thrust washers from both sides of
planetary gear. Remove rear planetary ring gear, races and thrust bearings. Using compressed air, confirm
1st and reverse brake piston moves smoothly. See Fig. 15 .
8. Remove flange snap ring. Remove flange, plates and discs. Note number and location of components.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Remove transaxle rear cover bolts. Tap rear cover using a plastic hammer. Remove cover. Remove
intermediate shaft. Remove snap ring. Using Spring Compressor (09351-32040), remove piston return
spring from transaxle case. Apply compressed air into oil passage. Remove 1st and reverse brake piston.
See Fig. 13 and Fig. 14 .
9. Remove parking lock pawl bracket. Remove parking lock rod. Remove pin, spring and parking lock pawl.
Remove manual valve shaft spring, collar and pin. Remove manual valve lever from transaxle case.
Remove manual shaft oil seal. Remove governor pressure adapter from transaxle case. See Fig. 14 .

Fig. 14: Exploded View Of Transaxle Internal Components

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 15: Removing 1st & Reverse Brake Piston

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 16: Exploded View Of 1st & Reverse Brake Piston

Courtesy of TOYOTA MOTOR SALES, U.S.A. INC.

COMPONENT DISASSEMBLY & REASSEMBLY

OIL PUMP

Disassembly

1. Remove race from stator shaft. Remove "O" ring and oil seal rings from pump body and stator shaft.
Remove clutch drum thrust washer from stator shaft.
2. Mark stator shaft and pump body for reassembly reference. Remove stator shaft bolts. Separate stator
shaft and pump body. Mark gear location for reassembly reference. Remove pump gears. Using
screwdriver, remove oil seal. See Fig. 17 .

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 17: Exploded View Of Oil Pump Assembly

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Inspection

1. Note position of oil pump gears. Clean all parts with solvent. Use compressed air to ensure oil passages
are clear. Check driven gear-to-body clearance. Push driven gear against one side of pump. Using a feeler
gauge, measure clearance between driven gear and pump body. See Fig. 18 . Replace pump housing if
clearance is not within specification. See OIL PUMP CLEARANCE SPECIFICATIONS table.
2. Using a feeler gauge, measure tip clearance between both gears and the crescent-shaped part of the pump
body. SeeFig. 19 . Replace the pump body if clearance is not within specification. Refer to OIL PUMP
CLEARANCE SPECIFICATIONS table.
3. Using a feeler gauge and straightedge, measure side clearance of both gears. See Fig. 20 . Replace pump
body if clearance is not within specification. See OIL PUMP CLEARANCE SPECIFICATIONS table.
Drive and driven gears are available in 3 different thicknesses. See DRIVE & DRIVEN GEAR
THICKNESS SPECIFICATIONS table.

OIL PUMP CLEARANCE SPECIFICATIONS

Application In. (mm)
Driven Gear-To-Pump Body
Standard .0028-.0059 (.071-.149)
Maximum .012 (.30)
Gear-To-Crescent Tip Clearance
Standard .0043-.0055 (.109-.139)
Maximum .012 (.30)
Gear Side Clearance
Standard .0008-.0020 (.020-.050)

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Maximum .004 (.10)

DRIVE & DRIVEN GEAR THICKNESS SPECIFICATIONS

I.D. Mark Thickness - In. (mm)
"A" .3717-.3723 (9.440-9.456)
"B" .3723-.3730 (9.456-9.474)
"C" .3730-.3736 (9.474-9.490)

4. Using a dial indicator, measure inside diameter of oil pump body bushing. Maximum inside diameter is
1.503" (38.18 mm). If inside diameter exceeds specification, replace oil pump body.
5. Using a dial indicator, measure inside diameter of stator shaft bushings. Maximum front side bushing
inside diameter is .849" (21.57 mm). Maximum rear side bushing inside diameter is 1.066" (27.07 mm).
If inside diameter exceeds specification, replace stator shaft.

Reassembly

1. Using Seal Installer (09350-32140), install NEW oil seal. Seal must be even with edge of pump body.
Coat all components with ATF. Install pump gears, aligning reference marks. Install stator shaft on pump
body. Align bolt holes and tighten bolts to 89 INCH lbs. (10 N.m). Coat thrust washer with petroleum
jelly.
2. Install thrust washer on pump body. Align washer tab with hollow of pump body. Install oil seal rings.
Ensure rings rotate smoothly after installation. DO NOT spread oil seal ring ends more than necessary for
installation. Using screwdrivers, check drive gear for smooth rotation. Install "O" ring. Install race on
stator shaft. See Fig. 17 .

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 18: Checking Oil Pump Driven Gear Clearance

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 19: Checking Oil Pump Gear Tip Clearance

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 20: Checking Oil Pump Gear Side Clearance

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

DIRECT CLUTCH

Disassembly

1. Remove snap ring from clutch drum. Remove flange, discs and plates. Note number and location of
components. See Fig. 21 . Using Clutch Spring Compressor (09351-32070) and press, compress piston
return springs. Remove snap ring, clutch spring compressor, spring retainer and piston return spring.
2. Install direct clutch on oil pump. Apply compressed air to oil pump oval shaped passage to remove
piston. See Fig. 22 . Remove the direct clutch from the oil pump. Remove clutch piston "O" rings. See
Fig. 21 .

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 21: Exploded View Of Direct Clutch Assembly

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 22: Checking Direct Clutch Piston Stroke

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Inspection

1. Clean all parts (except discs) with solvent. Dry parts using compressed air. Ensure check ball is free in
piston. Apply low air pressure to small hole in piston to check for air leakage around piston valve. Inspect
discs and plates for wear or burnt areas.
2. If disc lining is peeled or discolored, replace discs as necessary. Replace all damaged components. Using
a dial indicator, measure inside diameter of direct clutch bushing. Maximum inside diameter is
1.853" (47.07 mm). If inside diameter exceeds specification, replace direct clutch.

NOTE: New discs must be soaked in ATF for at least 15 minutes prior to reassembly.

Reassembly

1. Install NEW "O" rings on piston and coat with ATF. Using hand pressure, press direct clutch piston in
clutch drum with cup side upward. Install piston return spring and retainer. Compress piston return spring
and install snap ring.
2. Ensure snap ring gap does not align with spring retainer claw. Install one plate, one disc, 2 plates and one
disc. Install flange with flat side facing downward. Install snap ring. Ensure snap ring gap does not align
with drum cutout.
3. Install direct clutch on oil pump. Use dial indicator to check direct clutch piston stroke. Apply air
pressure to oil pump passage and note reading. See Fig. 22 . Clutch piston stroke should be .054-
.067" (1.37-1.70 mm). If piston stroke is not as specified, select appropriate flange to obtain correct piston
stroke. Flange is available in thicknesses of .118" (3.00 mm) and .133" (3.37 mm).

FORWARD CLUTCH

Disassembly

1. Remove thrust washer. Remove races and thrust bearings from both sides of clutch drum. Remove clutch
drum snap ring. Remove flange, discs and plates. Note number and location of components. See Fig. 23 .
2. Using Clutch Spring Compressor (09351-32070) and press, compress piston return spring. Remove snap
ring. Remove spring compressor and piston return spring.
3. To remove forward clutch piston, apply compressed air to oil passage hole (nearest piston) on rear of
forward clutch shaft. Remove oil seal rings (if necessary).

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 23: Exploded View Of Forward Clutch Assembly

Courtesy of TOYOTA MOTOR SALES, U.S.A. INC.

Inspection

Clean all parts (except discs) with solvent. Dry parts using compressed air. Ensure check ball is free in piston.
Apply low air pressure to small hole in piston to check for air leakage around piston valve. Inspect discs and
plates for wear or burnt areas. If disc lining is peeled or discolored, replace discs as necessary. Replace all
damaged components.

NOTE: New discs must be soaked in ATF at least 15 minutes prior to reassembly.

Reassembly

1. Install NEW seal rings (if necessary). Use care not to over expand seal rings. Install NEW "O" rings on
piston and coat with ATF. Using hand pressure, install piston in clutch drum with cup side upward.
2. Install piston return spring. Compress piston return spring using clutch spring compressor. Install snap
ring. Ensure snap ring gap does not align with spring retainer claw.
3. Install 3 plates and 3 discs in appropriate order. See Fig. 23 . Install flange with flat side facing
downward. Install snap ring. Ensure snap ring gap does not align with drum cutout.
4. Measure piston stroke by applying compressed air to oil passage hole (nearest piston) on rear of forward
clutch shaft and note reading. Clutch piston stroke must be .044-.058" (1.11-1.47 mm).

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

5. If piston stroke is not as specified, select appropriate flange to obtain correct piston stroke. Flange is
available in thicknesses of .118" (3.00 mm) and .133" (3.37 mm). Coat thrust washer, races and bearing
with petroleum jelly and install.

FRONT PLANETARY GEAR

Disassembly

1. Check No. 1 one-way clutch operation. Hold sun gear and rotate hub. Hub should rotate freely in
clockwise direction and lock when rotated in counterclockwise direction. See Fig. 24 . Turn hub
clockwise and remove 2nd brake hub and one-way clutch from sun gear.
2. Remove thrust washer and snap ring. Remove sun gear from input drum. Remove shaft snap ring from
sun gear. Remove one-way clutch retainer if clutch requires replacement. Remove one-way clutch from
hub.

Fig. 24: Checking No. 1 One-Way Clutch

Courtesy of TOYOTA MOTOR SALES, U.S.A. INC.

Inspection

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

1. Clean all parts with solvent. Dry parts using compressed air. Check thrust bearings, races and one-way
clutch for wear or damage. Replace if necessary.
2. Using a dial indicator, measure inside diameter of sun gear bushing. Standard inside diameter should
be .867-.868" (22.03-22.05 mm). Maximum inside diameter is .870" (22.10 mm). If inside diameter
exceeds specification, replace sun gear.
3. Using a feeler gauge, measure clearance between planetary pinion gear and planetary gear case. Standard
clearance should be .008-.020" (.20-.50 mm). Maximum clearance is .020" (.50 mm). If clearance
exceeds specification, replace planetary gear.
4. Using a dial indicator, measure inside diameter of ring gear flange bushing. Standard inside diameter
should be .749-.750" (19.03-19.05 mm). If inside diameter exceeds specification, replace flange.

Reassembly

Install shaft snap ring to sun gear. Install sun gear to drum. Install snap ring to drum. Install thrust washer to sun
gear input drum. See Fig. 25 . Rotate hub clockwise. Install one-way clutch and 2nd brake hub. Hold sun gear
and rotate hub. Hub should rotate freely in clockwise direction and lock when rotated in counterclockwise
direction.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 25: Exploded View Of Front Planetary Gear Assembly

Courtesy of TOYOTA MOTOR SALES, U.S.A. INC.

REAR PLANETARY GEAR

Disassembly

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

1. Check No. 2 one-way clutch operation. Hold outer race and rotate hub. Hub should rotate freely in
counterclockwise direction and lock when rotated in clockwise direction. See Fig. 26 .
2. Remove thrust washers from both sides of rear planetary gear. Separate No. 2 one-way clutch and
planetary gear. Remove snap rings and retainers from No. 2 one-way clutch. Note position of No. 2 one-
way clutch. Remove one-way clutch from outer race.

Inspection

1. Clean all parts with solvent. Dry parts using compressed air. Check thrust washers and one-way clutch for
wear or damage. Replace if necessary.
2. Using a feeler gauge, measure clearance between planetary pinion gear and planetary gear case. Standard
clearance should be .008-.020" (.20-.50 mm). Maximum clearance is .020" (.50 mm). If clearance
exceeds specification, replace planetary gear.

Reassembly

1. Coat all parts with ATF. Install one-way clutch into outer race. Flanged side of one-way clutch should
face toward shiny side of outer race. See Fig. 26 . Install retainers and snap rings.
2. Install planetary gear into one-way clutch. Planetary gear inner race should face toward back side of outer
race. Check operation of one-way clutch. Coat thrust washers with petroleum jelly. Install thrust washers
on both sides of planetary gear. Ensure thrust washer tab is aligned with hollow area in gear. See Fig. 27 .

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 26: Checking & Installing No. 2 One-Way Clutch

Courtesy of TOYOTA MOTOR SALES, U.S.A. INC.

Fig. 27: Exploded View Of Rear Planetary Gear Assembly

Courtesy of TOYOTA MOTOR SALES, U.S.A. INC.

1ST & REVERSE BRAKE PISTON

Disassembly

Using 1st and Reverse Spring Compressor (09351-32040), compress springs by tightening bolt gradually.
Remove snap ring and compressor. Remove piston return spring. Apply compressed air to oil passage in
transaxle case to remove piston. See Fig. 15 . Remove piston "O" rings.

Inspection

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Clean all parts with solvent. Dry parts using compressed air. Inspect piston for roughness or damage. Replace as
necessary.

Reassembly

1. Install NEW "O" rings on piston and coat with ATF. Install piston in transaxle case with spring seats
facing upward. Install piston return spring and snap ring in place. Using clutch spring compressor,
compress piston return spring. Avoid bending spring retainer or damaging transaxle case by
overtightening compressor.
2. Push snap ring into place with fingers. Ensure snap ring is fully seated and centered by spring retainer
lugs. Snap ring end gap must not align with spring retainer claw. Remove spring compressor. See Fig.
16 .

2ND COAST BRAKE

Disassembly

Remove oil seal ring from piston. Remove "E" ring from piston with needle-nose pliers. Remove spring, washer
and piston rod. See Fig. 28 .

Inspection

Replace brake band if lining is peeled, discolored or printed numbers are defaced. Before assembling NEW
band, soak in ATF for at least 15 minutes. If band is serviceable but piston rod stroke is not within specification,
select a NEW piston. Piston stroke should be .059-.118" (1.50-3.00 mm). Piston rods are available in lengths of
2.811" (71.40 mm) and 2.870" (72.90 mm).

Reassembly

Install washer and spring to piston rod. Install "E" ring while pushing piston. Apply ATF to oil seal ring. Install
oil seal ring to piston. DO NOT spread oil seal ring ends more than necessary for installation. See Fig. 28 .

2ND BRAKE PISTON

Disassembly & Reassembly

Apply compressed air to oil hole on 2nd brake drum and remove 2nd brake piston. Remove 2 "O" rings from
piston. Coat NEW "O" rings with ATF. Install "O" rings on piston. Using hand pressure, carefully press 2nd
brake piston into 2nd brake drum. See Fig. 29 .

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 28: Exploded View Of 2nd Coast Brake

Courtesy of TOYOTA MOTOR SALES, U.S.A. INC.

Fig. 29: Exploded View Of 2nd Brake Piston

Courtesy of TOYOTA MOTOR SALES, U.S.A. INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

INTERMEDIATE SHAFT

Disassembly & Reassembly

Using Puller (09950-00020), press intermediate shaft bearings from shaft. Using Adapter (09351-32090) and
press, install intermediate shaft bearings. Ensure gear flange end to intermediate shaft end measurement is
4.560" (115.82 mm). See Fig. 30 .

Fig. 30: Checking Intermediate Shaft Gear Flange

Courtesy of TOYOTA MOTOR SALES, U.S.A. INC.

CONTROL VALVE ASSEMBLY

NOTE: All control valve assembly components must be installed in original location.
Lay all components in sequence during removal for reassembly reference.
Throttle pressure is changed according to number of adjusting rings. When
assembling valve body, install same number of adjusting rings as were
removed. Some valve bodies do not have adjusting rings.

Disassembly

Remove 9 retaining bolts and the upper valve body cover. Remove strainer, 2 gaskets and plate. Remove sleeve
stopper. Remove 3 bolts and upper valve body. Remove 14 bolts, lower valve body cover and gasket. Remove 3
lower valve body bolts. Hold plate against lower valve body and carefully remove lower valve body. DO NOT
lose check balls. Note location of check balls, retainers and pins in valve body. Remove plate and gasket. See
Fig. 31 .

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 31: Exploded View Of Control Valve Assembly

Courtesy of TOYOTA MOTOR SALES, U.S.A. INC.

Inspection

1. Clean all parts with solvent. Dry parts with compressed air. Ensure all valve body oil passages are clear.
Inspect valves for scoring or roughness. Inspect valve springs for damage, squareness, rust and collapsed
coils. Measure spring free length and outer diameter.
2. Replace spring if not within specification. Refer to appropriate table under VALVE BODY SPRING
SPECIFICATIONS . Make sure valve body springs correspond with the appropriate valve. Make sure
the retainers are installed in appropriate locations. Refer to appropriate table under VALVE BODY
RETAINER SPECIFICATIONS .

VALVE BODY SPRING SPECIFICATIONS

UPPER VALVE BODY SPRING SPECIFICATIONS

Spring No. (1) Diameter: In. (mm) Free Length: In. (mm)

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

1 .374 (9.50) .854 (21.70)

2 .417 (10.60) 1.106 (28.10)
3 .311 (7.90) .921 (23.40)
4 .343 (8.70) 1.173 (29.80)
5 .362 (9.20) 1.209 (30.70)
6 .335 (8.50) .823 (20.90)
7 .402 (10.20) 1.047 (26.60)
(1) For spring locations, see Fig. 32 .

LOWER VALVE BODY SPRING SPECIFICATIONS

Spring No. (1) Diameter: In. (mm) Free Length: In. (mm)
1 .429 (10.90) 1.717 (43.60)
2 .252 (6.40) 1.071 (27.20)
3 .327 (8.30) 1.091 (27.70)
4 (A-131L) .315 (8.00) 1.236 (31.40)
4 (A-132L) .319 (8.10) .827 (21.00)
5 (A-131L Aisin) .311 (7.90) 1.146 (29.10)
5 (A-131L Toyota) .311 (7.90) 1.169 (29.70)
5 (A-132L Toyota) .311 (7.90) 1.169 (29.70)
6 .732 (18.60) 2.626 (66.70)
7 .433 (11.00) .783 (19.90)
8 .252 (6.40) .441 (11.20)
(1) For spring locations, see Fig. 34 .

VALVE BODY RETAINER SPECIFICATIONS

UPPER VALVE BODY RETAINER SPECIFICATIONS (1)

Application (Letter I.D.) (2) Height: In. (mm)
Accumulator Control Valve ("B") .453 (11.50)
Cut-Back Valve ("D") .362 (9.20)
Lock-Up Relay Valve ("E") .591 (15.00)
Throttle Modulator ("A") .362 (9.20)
2nd Coast Modulator Valve ("C") .591 (15.00)
(1) Width is .197" (5.00 mm) for all retainers.

(2) For retainer locations, see Fig. 33 .

LOWER VALVE BODY RETAINER SPECIFICATIONS (1)

Application (Letter I.D.) (2) Height: In. (mm)
Detent Regulator ("E") .453 (11.50)

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Secondary Regulator ("A") .453 (11.50)

Intermediate Shift Valves ("C") .453 (11.50)
Low Coast ("B") & 1-2 Shift Valves ("F") .362 (9.20)
2-3 Shift Valve ("D") .236 (6.00)
(1) Width is .197" (5.00 mm) for all retainers except 2-3 shift valve. The 2-3 shift valve retainer width is
315" (8.00 mm).
(2) For retainer locations, see Fig. 35 .

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 32: Exploded View Of Upper Valve Body

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 33: Upper Valve Body Check Ball, Pin & Retainer Locations
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 34: Exploded View Of Lower Valve Body

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 35: Lower Valve Body Check Ball, Pin & Retainer Locations
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NOTE: Valves may be held in with pins or retainers and plugs. Remove components
and note locations. Arrange parts in order for reassembly reference.

Reassembly

1. Coat all components with ATF. To reassemble, reverse disassembly procedure. Ensure check balls, pins
and strainer on upper side of lower valve body are installed correctly. See Fig. 35 . Ensure check ball,
pins, retainers and vibrating stopper on lower side of upper valve body are installed correctly. See Fig.
31 .
2. Position NEW No. 2 gasket, plate and NEW No. 1 gasket on lower valve body. Ensure gaskets are
installed in correct locations. See Fig. 36 . Place lower valve body with plate and gaskets on upper valve
body. DO NOT let components separate. Align each bolt hole in valve bodies with gaskets and plate.
3. Install and finger tighten bolts in lower valve body to secure upper valve body. See Fig. 37 . Install the
lower valve body cover over the NEW gasket. Install and finger tighten 14 cover bolts. See Fig. 38 .
Install and finger tighten 1.102" (28 mm) bolts (3) in upper valve body.
4. Ensure retainers are installed correctly on upper side of upper valve body. See Fig. 33 . Install sleeve
stopper. Position NEW gasket, plate and gasket. Install strainer onto plate. Position upper valve body
cover and install and finger tighten 9 bolts. See Fig. 38 . Check alignment of gaskets and plates. Tighten
upper and lower valve body bolts to 48 INCH lbs. (5.4 N.m).

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 36: Identifying Valve Body Gaskets

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 37: Installing Lower Valve Body-To-Upper Valve Body Bolts

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 38: Identifying Upper & Lower Valve Body Cover Bolt Locations
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

DIFFERENTIAL ASSEMBLY

Disassembly

1. Remove carrier cover. Attach an INCH lb. torque wrench to end of pinion shaft. Measure total preload
required to rotate pinion. Note and record reading. Position dial indicator assembly on transaxle case.
Position dial indicator tip against side gear. Measure side gear backlash while holding one pinion toward
case. Backlash should be .002-.008" (.05-.20 mm). Note and record reading.
2. Remove left side bearing retainer bolts. Remove bearing retainer. Remove "O" ring from retainer.
Remove right side bearing cap. Remove differential, outer race and adjustment shim from transaxle case.
3. Attach an INCH lb. torque wrench to end of pinion shaft. Measure drive pinion preload. Note and record
reading. Starting preload should be 4-7 INCH lbs. (.5-.8 N.m) for a used bearing. Total preload reading
minus drive pinion preload should equal 1-2 INCH lbs. (.1-.2 N.m). If not within specification, side
bearing preload requires adjustment.
4. Remove bearings from differential case using Puller (09502-10012). Remove speedometer drive gear.
Mark ring gear and case for reassembly reference. Spread ring gear bolt locking plates. Remove ring gear
bolts and locking plates. Using brass hammer, tap ring gear from differential case.
5. Using a dial indicator, check side gear backlash. Hold one pinion against case. Measure side gear
backlash. Backlash must be .002-.008" (.05-.20 mm). If backlash is not within specification, side gear
thrust washers must be replaced.
6. Drive out pinion shaft lock pin from ring gear side. Remove pinion shaft, pinion gears, side gears and
thrust washers. Remove left oil seals from transaxle case or bearing retainer. Using a long screwdriver,
remove right oil seal from transaxle case. Using Remover/Installer (09351-32090), remove left outer
bearing race and shim.

Cleaning & Inspection

Clean all parts with solvent. Dry with compressed air. Check bearings and gears for wear or damage. Replace if
necessary.

Reassembly

1. Install original shim onto retainer. Using Race Installer (09351-32111) and press, install outer race.
Lubricate oil seal lip. Using Seal Installer (09351-32150) and handle, install oil seals until oil seal surface
is flush with surface of transaxle case or bearing retainer.
2. Select thrust washers that will ensure correct side gear backlash. Thrust washers are available in
thicknesses of .037-.047" (.95-1.20 mm) in .20" (5.0 mm) increments. Install thrust washers and side
gears in differential case. If possible, install same size thrust washers on both sides. Install pinion gears
and pinion shaft. Check side gear backlash to ensure proper thrust washers are used.
3. Once backlash is correct, using hammer and punch, drive lock pin through differential case and into
pinion shaft. Stake differential case to retain lock pin. Install speedometer drive gear onto differential
case. Using Adapters (09351-32090 and 09351-32180) and press, install side bearings onto differential
case.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

4. Clean ring gear contact surface of differential case. Heat ring gear to 212°F (100°C) in an oil bath. DO
NOT heat ring gear above 230°F (110 °C). Clean contact surface of ring gear using cleaning solvent.
Align ring gear with differential case. Install ring gear on differential case.
5. Install NEW locking plates and bolts. Tighten bolts evenly and in several steps to 72 ft. lbs. (97 N.m) for
A-131L transaxle and 91 ft. lbs. (124 N.m) for A-132L transaxle. Stake lock plates. Stake one tab flush
with flat surface of bolt. Stake 2nd tab against corner of bolt.
6. Install outer race and original adjusting shim on right side bearing. Remove differential drive pinion. See
DIFFERENTIAL DRIVE PINION ASSEMBLY . Install differential in transaxle case. Install left
bearing outer race, shim and retainer without "O" ring. Snug bolts evenly and gradually while turning ring
gear. Tighten bolts to 14 ft. lbs. (19 N.m). Install right side bearing cap. Snug bolts evenly and gradually
while turning ring gear. Tighten bolts to 36 ft. lbs. (49 N.m).
7. Using Differential Preload Adapter (09564-32011) and an INCH lb. torque wrench, measure differential
bearing preload with differential drive pinion removed. See Fig. 39 . Preload must be within
specifications. See DIFFERENTIAL PRELOAD SPECIFICATIONS table. If pre-load is not within
specifications, remove differential from transaxle case and replace adjustment shim at right side bearing
with appropriate shim.
8. Adjustment shims are available in thicknesses of 063-.083" (1.60-2.10 mm) in .20" (5.0 mm) increments.
Preload will change approximately 2.6-3.5 INCH lbs. (.3-.4 N.m) with each shim thickness.

DIFFERENTIAL PRELOAD SPECIFICATIONS

Application INCH Lbs. (N.m)
New Bearings 9-14 (1.0-1.6)
Used Bearings 4-7 (.5-.8)

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 39: Measuring Differential Bearing Preload

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

9. If preload is within specification, remove left bearing retainer. DO NOT lose selected adjustment shim.
Install "O" ring on left bearing retainer. Remove right side bearing cap bolts and coat threads with sealant.
Tighten bolts evenly and gradually to 36 ft. lbs. (49 N.m), while turning ring gear.
10. With drive pinion installed in case, measure total preload using procedure used during disassembly.
Starting preload should be drive pinion preload of 4-7 INCH lbs. (.5-.8 N.m) plus 3-4 INCH lbs. (.3-.4
N.m) for NEW bearings or 1-2 INCH lbs. (.1-.2 N.m) for used bearings.
11. If total preload is not within specification, disassemble differential and readjust. If total preload is correct,
stake counter-driven gear lock nut. Install drive pinion cap. Coat carrier cover bolt threads with sealant.
Install carrier cover and gasket. Install bolts and tighten to 18 ft. lbs. (25 N.m). To complete reassembly,
reverse disassembly procedure. Tighten all bolts to specification. See Fig. 40 .

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 40: A-131L & A-132L Transaxle Differential Assembly

Courtesy of TOYOTA MOTOR SALES, U.S.A. INC.

DIFFERENTIAL DRIVE PINION ASSEMBLY

Disassembly

1. Using an INCH lb. torque wrench, measure drive pinion preload with differential assembly removed.
Starting preload should be 4-7 INCH lbs. (.5-.8 N.m) for used bearings. Remove drive pinion bolt and
cap. Using chisel, loosen staked area of counter-driven gear lock nut. Install Holder (09351-32032) on
gear. Remove lock nut. Using Puller (09351-32061), remove counter-driven gear and bearing.
2. Using Puller (09308-10010), remove bearing race from transaxle case. Remove oil slinger, bearing spacer

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

and governor drive gear. Remove snap ring from transaxle case. Using brass drift and hammer, drive
pinion and bearing cage from bore. Press governor drive gear from drive pinion shaft. Remove bearing
cage from drive pinion. Remove "O" ring from bearing cage. See Fig. 40 .
3. Using Bearing Remover (09950-32020), press bearing from counter-driven gear. Using bearing remover,
remove pinion shaft bearing. Using hammer and brass drift, drive out drive bearing outer race from cage.
Note position of oil seal lips. Remove seals from cage.

Cleaning & Inspection

Clean all parts with solvent. Dry parts with compressed air. Check bearings and gears for wear or damage.
Replace if necessary.

Reassembly

1. Lubricate lips of oil seals. Using Remover/Installer (09351-32090), install inner seal with lip facing
downward. Oil seal must be installed to proper depth of .315" (8.00 mm) for A-131L transaxle,
and .374" (9.50 mm) for A-132L transaxle.
2. Using seal installer, install outer seal with lip facing upward. Position oil seal flush with cage surface.
Using Bearing Race Installer (09351-32111), install outer bearing race in bearing cage.
3. Using Bearing Installer (09351-32100), install drive pinion shaft bearing. Using remover/installer, install
bearing on counter-driven gear. Install "O" ring on bearing cage. Install cage on drive pinion shaft. Use
care not to damage oil seals. Install governor drive gear. Install shaft assembly into transaxle case.
4. Tap bearing cage into transaxle case. Ensure cage is past snap ring groove. Install snap ring. Insert brass
bar into hole and tap drive pinion shaft against snap ring. Ensure snap ring is fully seated. Install oil
slinger with lip facing outward. Using Race Installer (09351-32140), install outer race in transaxle case
with narrow end facing out. Install NEW bearing spacer, small end first.
5. Drive counter-driven gear onto shaft until lock nut can be installed. DO NOT tap on transaxle case.
Lubricate lock nut threads and install lock nut on shaft. Install holder on gear. Tighten counter-driven
gear lock nut to 127 ft. lbs. (172 N.m). Rotate counter-driven gear both directions several times.
6. Using an INCH lb. torque wrench, measure drive pinion preload. Starting preload should be 9-14 INCH
lbs. (1.0-1.6 N.m) for NEW bearings and 4-7 INCH lbs. (.5-.8 N.m) for used bearings. Replace bearing
spacer if preload exceeds specifications. Recheck preload procedure (if necessary).
7. If preload is less than specification, tighten lock nut in additional increments of 9.5 ft. lbs. (13 N.m) .
Tighten lock nut until specified preload is obtained. If maximum torque of 213 ft. lbs. (289 N.m) is
exceeded while tightening nut, replace bearing spacer and repeat procedure. DO NOT back off nut to
reduce preload.

TRANSAXLE REASSEMBLY

NOTE: Coat all oil seal rings, clutch discs, clutch plates, rotating parts and sliding
surfaces with ATF prior to reassembly. Soak clutch discs in ATF for at least 15
minutes prior to installation. For bearing race and thrust bearing installation
direction and locations, See Fig. 43 . For bearing race and thrust bearing outer
diameter specifications, see BEARING RACE & THRUST BEARING
SPECIFICATIONS table.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

1. Install governor pressure adapter into case. Align adapter and transaxle case hole and install torsion
spring. Ensure adapter does not slide and spring does not fall out when pulled. Install manual valve lever
shaft oil seal to transaxle case. Install NEW collar to manual valve lever. See Fig. 40 .
2. Install manual valve lever shaft to transaxle case through manual valve lever. Using a pin punch, drive in
roll pin until flush with manual valve lever surface. Align collar hole with notch in lever and stake in
position using a hammer and punch. Install retaining spring. Ensure lever moves smoothly.
3. Install parking lock pawl in transaxle case. Hook spring end on pawl and transaxle case. Install pin into
hole of transaxle case, through spring and pawl. Install parking lock rod.
4. Install parking lock pawl bracket. Tighten to 65 INCH lbs. (7.4 N.m). Check operation of parking lock
pawl to ensure counter-driven gear is locked when manual valve lever is in "P" position. Install 1st and
reverse brake piston (if necessary). See 1ST & REVERSE BRAKE PISTON under COMPONENT
DISASSEMBLY & REASSEMBLY. Install intermediate shaft. Install transaxle rear cover and gasket.
Tighten bolts to 18 ft. lbs. (25 N.m).
5. Ensure intermediate shaft turns smoothly. Using a dial indicator, check intermediate shaft end play. End
play should be .019-.059" (.49-1.51 mm). If end play is not as specified, check installation of intermediate
shaft. Install 1st and reverse inner flange with flat end facing upward. Install discs and plates starting with
disc, alternating with plate and ending with disc.
6. Install outer flange with flat side toward piston. Install snap ring. Ensure end gap of snap ring is not
aligned with cutout of transaxle case. Apply compressed air to oil passage to ensure piston moves. See
Fig. 15 . Coat bearings and races "E" with petroleum jelly and install on ring gear. See Fig. 43 . Install
ring gear in transaxle case.
7. Align flukes of discs in 1st and reverse brake. Coat thrust washer with petroleum jelly. Align tab of thrust
washer with hollow of planetary carrier. Align planetary carrier splines with flukes of discs. Install rear
planetary gear. Install No. 2 one-way clutch in transaxle case with shiny side upward. Install one-way
clutch on inner race while turning planetary gear clockwise.
8. Coat thrust washer with petroleum jelly and install on planetary gear. Check No. 2 one-way clutch
operation by turning planetary gear. Gear should rotate freely in clockwise direction and lock in
counterclockwise direction. See Fig. 20 . Install snap ring. Ensure snap ring end is not aligned with cutout
of transaxle case.
9. Install 2nd coast brake band guide with tip contacting transaxle case. Install 2nd brake flange with flat
side facing upward. Install discs and plates in the following order: for A-131L transaxle install disc, plate,
disc, plate, disc, plate. For A-132L transaxle install disc, plate, plate, disc, plate, plate.
10. Install piston return spring assembly with springs over protrusions in transaxle case. Align groove of 2nd
brake drum with guide. Install drum in transaxle case. Install snap ring. Using 2 hammers, compress
piston return springs with handles. Install snap ring into groove. Ensure end gap of ring is not aligned
with cutout in transaxle case.
11. Install 2nd brake drum gasket until gasket makes contact with 2nd brake drum. Apply compressed air to
center oil passage (next to manual valve lever shaft) and ensure piston movement. Align flukes of 2nd
brake discs. Install hub on 2nd brake discs. Check distance between surfaces of 2nd brake hub and rear
planetary gear. Distance should be approximately .20" (5.0 mm).
12. Install sun gear and input drum on No. 1 one-way clutch while turning sun gear clockwise. Ensure thrust
washer is on sun gear input drum. Coat bearings and races "D" and "C" with petroleum jelly and install on
ring gear and front planetary gear. See Fig. 43 . Install planetary gear on ring gear. Install front planetary
gear assembly on sun gear.
13. If planetary gear is correctly installed, ring gear flange bushing will be flush with intermediate shaft

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

shoulder. Coat race with petroleum jelly and install on ring gear flange. Install intermediate shaft oil seal
ring.
14. Install 2nd coast brake band in transaxle case. Install pin through oil pump mounting bolt hole. Coat
bearings and races "A" and "B" with petroleum jelly and install on both sides of forward clutch drum. See
Fig. 43 . Coat clutch drum thrust washer with petroleum jelly and install with oil groove facing upward
on direct clutch drum. Align flukes of direct clutch discs.
15. Mesh hub with direct clutch flukes while turning clutch drum or forward clutch. If disc flukes are meshed
with hub correctly, end of direct clutch drum bushing will be flush with surface of forward clutch. Place
direct clutch and forward clutch into transaxle case. Rotate forward clutch to mesh front planetary ring
gear and discs. Assembly is fully seated when distance is approximately .118" (3.00 mm).
16. Coat race "A" with petroleum jelly and install on stator shaft. See Fig. 41 . Install "O" ring on oil pump.
Install oil pump into transaxle case. Hold input shaft and lightly press oil pump body to slide oil seal rings
on stator shaft through direct clutch drum. Install and tighten bolts to 16 ft. lbs. (22 N.m).

NOTE: DO NOT apply excessive pressure on oil pump. If excessive pressure is

used, seal rings will stick to direct clutch drum.

17. Measure input shaft end play. End play should be .012-.035" (.30-.90 mm). If end play is not as specified,
replace oil pump race. Oil pump races are available in thicknesses of .031" (.80 mm) and .055" (1.40
mm). Ensure input shaft rotates smoothly. Install "O" rings on brake piston cover. Install outer spring,
2nd coast brake piston and cover into bore. Install snap ring. Ensure front end of piston rod contacts
center of 2nd brake band depression.
18. Measure 2nd coast brake piston stroke by applying compressed air to oil passage in transaxle case. See
Fig. 41 . Piston stroke should be .059-.118" (1.50-3.00 mm). If piston stroke is not within specification,
replace piston rod. Piston rods are available in lengths of 2.811" (71.40 mm) and 2.870" (72.90 mm).
Recheck piston travel after changing piston rod. It travel still exceeds specification, replace 2nd coast
brake band.
19. Apply compressed air to oil passage and check piston rod movement. See Fig. 39 . Coat accumulator
piston "O" rings with ATF. Install "O" rings on accumulator pistons. Check accumulator spring free
length. See appropriate table under ACCUMULATOR SPRING SPECIFICATIONS . Replace as
necessary. Install pistons and springs in appropriate locations. See Fig. 40 . Install accumulator cover and
gasket. Tighten bolts to 89 INCH lbs. (10 N.m).
20. Install 2nd brake apply gasket and governor oil strainer. Install throttle cable into transaxle case. Use care
not to damage "O" ring. Ensure cable is fully seated in transaxle case. Install control valve assembly.
Ensure proper length bolt is used in proper location. See CONTROL VALVE ASSEMBLY under ON-
VEHICLE SERVICE. Tighten bolts to 89 INCH lbs. (10 N.m).
21. Align manual valve with pin on manual shift lever. Install manual valve body. Tighten bolts to 89 INCH
lbs. (10 N.m). Install detent spring on manual valve body. Tighten bolts to 89 INCH lbs. (10 N.m).
Ensure manual valve lever is touching center of detent spring tip roller.
22. Install oil tubes. DO NOT bend or damage tubes. Install oil tube bracket. Tighten bolts to 89 INCH lbs.
(10 N.m). Install oil strainer. Tighten bolts to 89 INCH lbs. (10 N.m). Install magnets into oil pan. Ensure
magnets do not interfere with oil tubes. Install oil pan with NEW gasket. Tighten bolts to 43 INCH lbs.
(4.9 N.m).
23. Install governor body adapter, governor body with plate washer and thrust washer onto governor body.
Install cover and "O" ring. Install cover bracket with 2 bolts. Tighten bolts to 115 INCH lbs. (13 N.m).

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Install throttle cable retaining plate. Install filler tube and dipstick. Install seal and neutral safety switch.
Tighten and secure with lock plate. Tighten nut to 61 INCH lbs. (6.9 N.m).
24. Adjust neutral safety switch and tighten adjusting bolts to 48 INCH lbs. (5.4 N.m). Install manual shift
lever. Tighten bolt to 115 INCH lbs. (13 N.m). Install oil cooler pipes and unions. Tighten unions to 20 ft.
lbs. (27 N.m).
25. Install torque converter on transaxle. Using a straightedge and calipers, measure torque converter installed
depth. Distance should be .906" (23.00 mm) for Corolla, .787" (20.00 mm) for Prizm and .528" (13.40
mm) for Tercel. See Fig. 44 .

Fig. 41: Checking 2nd Coast Brake Band

Courtesy of TOYOTA MOTOR SALES, U.S.A. INC.

ACCUMULATOR SPRING SPECIFICATIONS

ACCUMULATOR SPRING SPECIFICATIONS (A/W A-131L)

Application Free Length - In. (mm)
Forward Clutch
Inner 1.523 (38.68)

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Outer 2.074 (52.68)

Direct Clutch 2.935 (74.54)
2nd Brake
No. 1 1.385 (35.18)
No. 2 2.231 (56.68)

ACCUMULATOR SPRING SPECIFICATIONS (TOYOTA A-131L)

Application Free Length - In. (mm)
Forward Clutch
Inner 1.523 (38.68)
Outer 2.074 (52.68)
Direct Clutch 3.101 (78.76)
2nd Brake 2.482 (63.05)

ACCUMULATOR SPRING SPECIFICATIONS (A-132L)

Application Free Length - In. (mm)
Forward Clutch 2.067 (52.50)
Direct Clutch 2.618 (66.50)
2nd Brake 2.625 (66.68)

Fig. 42: Identifying Accumulator Piston & Spring Locations

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 43: Identifying Thrust Bearing & Race Locations

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Fig. 44: Measuring Torque Converter Depth

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

BEARING RACE & THRUST BEARING SPECIFICATIONS

Outer Diameter: In.
Application (Letter I.D.) (1) (mm)
Front Bearing Race
"A" 1.693 (43.00)
"B" & "C" 1.492 (37.90)
"D" 1.772 (45.00)
"E" 1.469 (37.30)
Thrust Bearing
"A" 1.654 (42.00)
"B" & "C" 1.421 (36.10)
"D" 1.772 (45.00)
"E" 1.480 (37.60)
Rear Bearing Race
"A" 1.654 (42.00)
"B" 1.406 (35.70)
"C" 1.378 (35.00)
"D" N/A

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 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

"E" 1.480 (37.60)

(1) For bearing race and thrust bearing locations, see Fig. 43 .

TRANSAXLE SPECIFICATIONS
TRANSAXLE SPECIFICATIONS
Application In. (mm)
Bushing Inside Diameter (Maximum)
Direct Clutch 1.853 (47.07)
Oil Pump Body 1.503 (38.18)
Ring Gear Flange .749-.750 (19.03-19.05)
Stator Shaft
Front .849 (21.57)
Rear 1.066 (27.07)
Sun Gear
Standard .867-.868 (22.03-22.05)
Maximum .870 (22.10)
Input Shaft End Play .012-.035 (.30-.90)
Intermediate Shaft End Play .019-.059 (.49-1.51)
Piston Stroke
Direct Clutch .054-.067 (1.37-1.70)
Forward Clutch .044-.058 (1.11-1.47)
2nd Coast Brake .059-.118 (1.5-3.0)
Side Gear Backlash .002-.008 (.05-.20)
Torque Converter Depth
Corolla .906 (23.00)
Prizm .787 (20.00)
Tercel .528 (13.40)

TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS
Application Ft. Lbs. (N.m)
Bearing Retainer Bolt 14 (19)
Converter-To-Drive Plate Bolt
A-131L 20 (27)
A-132L 13 (18)
Counter-Driven Lock Nut
Standard 127 (172)
Maximum 213 (289)
Drive Plate Mounting Bolt 47 (64)

miércoles, 8 de febrero de 2023 06:32:19 p. m. Page 67 © 2011 Mitchell Repair Information Company, LLC.
 1990 Toyota Corolla
1984-94 AUTOMATIC TRANSMISSIONS General Motors Corp. - Toyota A-131L & A-132L

Oil Cooler Union Nut 20 (27)

Oil Pan Drain Plug 36 (49)
Oil Pump Mounting Bolt 16 (22)
Ring Gear Bolt
A-131L 72 (97)
A-132L 91 (124)
Side Bearing Cap Bolt 36 (49)
Transaxle-To-Engine Bolt
10 mm 34 (46)
12 mm 47 (64)
Transaxle Rear Cover Bolt 18 (25)
INCH Lbs. (N.m)
Accumulator Cover Bolt 89 (10)
Control Valve Assembly-To-Transaxle Bolt 89 (10)
Manual Shift Lever Nut 115 (13)
Manual Valve Body Bolt 89 (10)
Neutral Safety Switch
Adjusting Bolt 48 (5.4)
Retaining Nut 61 (6.9)
Oil Pan Bolt 43 (4.9)
Oil Pump Stator Shaft Bolt 89 (10)
Oil Strainer Bolt 89 (10)
Parking Lock Pawl Bracket Bolt 65 (7.4)
Upper Valve Body-To-Lower Valve Body Bolt 48 (5.4)

miércoles, 8 de febrero de 2023 06:32:19 p. m. Page 68 © 2011 Mitchell Repair Information Company, LLC.