R E M ANUFAC T UR E D VA LVE BO DIES

Te c h & I n s t a l l T i p s

U151E, U151F, U250E

Remanufactured
Valve Body
(’04–’16)

Part Nos.
TOY181
TOY181-RMN
NOTE: Save your existing manual valve for
reuse with our remanufactured valve body.

Valve Body Installation Tips

U151 Solenoid ID Figure 1
1. V
 erify Case Accumulator Pistons & Springs are Installed Correctly
Temperature
Common spring colors:
Sensor
• C2 (Closest to bell housing) = Yellow DSL Location
• C3 (Middle) = Plain/No color SL2

• B3 (Rear) = Purple (both inner and outer) S4

2. Air Check SR

While valve body is out, air-check indicated circuits (Figure 2) using low,
regulated air pressure. This will help you discover any issues prior to installing the
remanufactured valve body. SL3 SLT SL1
3. Install Valve Body onto Case Common Internal Wire Colors
a. Install drain back checkball and spring into case, spring first (Figure 2).
Solenoid Color
b. Verify B1 and B2 apply seals are in the case locations.
SL1 White & Black
c. Align slot in manual valve with manual linkage. SLT Green & Gray
d. A
 ssemble valve body on case and torque bolts to 11 Nm or 8 ft-lb. SL3 Red & Blue
e. Connect wire harness to solenoids and install temperature sensor (Figure 1). Assemble SR Purple
bracket into temperature sensor slot and torque bolt to 6.6 Nm or 58 in-lb. S4 Yellow
f. Install filter and three retaining bolts and torque to 11 Nm or 8 ft-lb. SL2 Green & Brown
DSL Light Blue
g. Assemble pan gasket and pan onto transmission case and torque bolts to 7.8 Nm or
69 in-lb.
©2019 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company TOY181-TECH-INSTALL 01-09-19
866-243-8829 • 856-848-0908 • F: 856-848-1080 • www.sonnax.com Page 1
 R E M ANUFAC T UR E D VA LVE BO DIES
U151E, U151F, U250E VALVE BODY TOY181, TOY181-RMN Te c h & I n s t a l l T i p s

Valve Body Installation Tips (continued) Air Check Locations and Identifiers Figure 2

4. Fluid Fill & Road Test Lube Pressure

a. Fill transmission with Toyota WS transmission fluid to factory spec.
Pump Suction TCC Release
b. Let engine run to warm transmission fluid to approximately 175°. TCC Apply

c. Install scan tool to verify transmission fluid temp is achieved. Pump
B2 Clutch Pressure Forward Clutch
NOTE: This function must be done with a capable scan tool. 1st Reverse

d. Reset transmission memory with capable scan tool. (Battery

C2 Accumulator
disconnect will not reset.)
e. Road test vehicle performing 10–15 upshift and downshift
cycles through all five speeds. Drain-Back
Check Valve
NOTE: A small 2-3 upshift flare or overlap issue, clunk into 4th Gear and
a 3-2 downshift clunk is common during adaptive relearn. This condition
will typically resolve itself within the 10–15 shift cycles after reset is C3
performed. Accumulator

Transmission Diagnostic Tips

This remanufactured valve body has been through a rigorous inspec- B3
tion and rebuild process, then a comprehensive, functional hydraulic Accumulator
and electronic test to ensure it meets OE performance and quality. It
C2 Reverse Clutch
is designed to eliminate many pressure-, shift- and converter-related
B1 Clutch
complaints, but will not correct complaints that stem from other 2nd Brake Lube
areas of the transmission.
B3 UD
The following are common areas of failure or root causes for symp- C3 UD Clutch Brake
Clutch C0 Direct Clutch
toms that could be attributed to valve body issues that should also
be examined or addressed during your transmission build. A brake
and clutch application chart (Figure 3) is below for additional aid in Shift quality complaints can also be caused by:
diagnosing problems.
• Clutch and brake clearance issues
• 5-4 Downshift clunk can be caused by C1 clutch piston • Low battery voltage and poor battery grounds
debonding.
• Bushing/bearing failure and overheat can be caused by case
• 2-3 Upshift flare and or binding can be caused by sealing ring bearings turning, evidenced by bits of aluminum debris in ATF.
problems in the rear cover.
• This can cause premature C0 clutch failure. NOTE: The case bearing has been known to spin out on high
mileage units, causing fine metal to build up which can hang
A bind-up during 2-3 upshift can be caused by bad speed sensors. up solenoids and valve trains in the valve body.

Clutch & Brake Application Chart Figure 3

REV No. 1 No. 2

FWD Input Direct U/D 2nd L/R U/D One-Way One-Way
Clutch Clutch Clutch Clutch Brake Brake Brake Clutch Clutch
Gear Range C1 C2 C0 C3 B1 B2 B3 F1 F2
Park ON
Reverse ON ON ON
Neutral ON
D-1st Gear ON ON ON ON
D-2 Gear
nd
ON ON ON ON
D-3rd Gear ON ON ON ON
D-4th Gear ON ON ON ON
D-5th Gear ON ON ON

©2019 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company TOY181-TECH-INSTALL 01-09-19

866-243-8829 • 856-848-0908 • F: 856-848-1080 • www.sonnax.com Page 2