Toyota/Lexus U151E, U151F, U250E
U151E-U250E-ZIP
Critical Wear Areas & Vacuum Test Locations Drop-In Zip Valve™
Parts Available Zip Kit® Available
NOTE: OE valves are shown in rest position and should be tested in rest position unless otherwise indicated. Test locations are pointed to with an arrow.
Springs are not shown for visual clarity. Low vacuum reading indicates wear and Sonnax parts are noted for replacement.
Lower Valve Body – Bottom Side 20
15
10
For specific vacuum test information, refer to individual part
U250E Shown Here 25
30
VACUUM
0
5 instructions included in kits and available at www.sonnax.com.
TEST
Click on Sonnax part numbers to see more information.
4-5 Shift Valve B2 (Low/Reverse) Switch Valve
• Delayed 3rd • B2 Brake clutches burned
• UD/C3 Clutch burned • Delayed Reverse
• Delayed or no 5th gear • No engine braking in manual low
B2 (Low/Reverse) Apply
Control Plunger
• Delayed Reverse
• B2 Brake clutches burned
• No engine braking in manual low
• Erratic shift timing
Replace with Sonnax Part No.
27741-06K
B1 (2nd) Apply
Control Plunger
• 2-3 or 4-3 Bind-up
• B1 brake clutches burned
• Harsh 1 through 4 maneuver shifts
• Erratic shift timing
Replace with Sonnax Part No.
27741-04K
NOTE: Seal port on opposite side when testing.
Boost Valve
• Soft shifts
• Low line rise in Drive
• High line pressure in Reverse
Replace with Sonnax Part No.
27741-01K
Clutch Apply Control Valve
• Burnt Forward/C1 Clutch, Direct/C0 Clutch
and 2nd/B1 Brake
• Flare shifts • Bind-ups
NOTE: Stroke valve to ensure it is not stuck.
©2020 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company U151E-U250E-VacTestGuide 10-02-20
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com Page 1
Toyota/Lexus U151E, U151F, U250E
U151E-U250E-ZIP
Critical Wear Areas & Vacuum Test Locations Drop-In Zip Valve™
Parts Available Zip Kit® Available
NOTE: OE valves are shown in rest position and should be tested in rest position unless otherwise indicated. Test locations are pointed to with an arrow.
Springs are not shown for visual clarity. Low vacuum reading indicates wear and Sonnax parts are noted for replacement.
Lower Valve Body – Bottom Side 20
15
10
For specific vacuum test information, refer to individual part
U250E Shown Here 25
30
VACUUM
0
5 instructions included in kits and available at www.sonnax.com.
TEST
Click on Sonnax part numbers to see more information.
End Plugs, B2 (Low/Reverse) Switch Valve
Multiple Locations • B2 Brake clutches burned
• Inconsistent shift quality • Flare shifts • Delayed Reverse
• Clutch failure • Bump shifts • Bang shifts • No engine braking in manual low
• Shift codes
Replace with Sonnax Part No.
27741-20K
NOTE: Two Locations =
Pressure Regulator Valve
• Soft shifts • Low line pressure • Harsh shifts
• High line pressure in Reverse
• Clutch & band failures
• Low converter pressure • High line pressure
Replace with Sonnax Part No.
27741-08K Requires 57917E-TL8
Clutch Apply Control Valve
• Burnt Forward/C1 Clutch, Direct/C0 Clutch
& 2nd/B1 Brake
• Flare shifts • Bind-ups
NOTE: Stroke valve to ensure it is not stuck.
B1 (2nd) Apply
Control Plunger
• 2-3 or 4-3 Bind-up
• B1 brake clutches burned
• Harsh 1 through 4 maneuver shifts
• Erratic shift timing
Replace with Sonnax Part No.
27741-04K
NOTE: Seal this port and test on opposite side.
©2020 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company U151E-U250E-VacTestGuide 10-02-20
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com Page 2
Toyota/Lexus U151E, U151F, U250E
U151E-U250E-ZIP
Critical Wear Areas & Vacuum Test Locations Drop-In Zip Valve™
Parts Available Zip Kit® Available
NOTE: OE valves are shown in rest position and should be tested in rest position unless otherwise indicated. Test locations are pointed to with an arrow.
Springs are not shown for visual clarity. Low vacuum reading indicates wear and Sonnax parts are noted for replacement.
Upper Valve Body – Bottom Side 20
15
10
For specific vacuum test information, refer to individual part
25 5 instructions included in kits and available at www.sonnax.com.
U250E Shown Here 30
VACUUM
0
TEST
Click on Sonnax part numbers to see more information.
Solenoid Modulator Valve End Plugs, Lockup Relay Valve
• Slips & flares Multiple Locations • TCC apply & release concerns
• Erratic shift feel & engagements • Shift concerns • Clutch failure • TCC codes
• Harsh upshifts Replace with Sonnax Part No. 27741-20K • Burnt converter/overheating
Replace with Sonnax Part No.
NOTE: Eight locations =
27741-13K
Requires F-27741-TL13 & VB-FIX
Lockup Control
Plunger Assembly
B2 (Low/Reverse) • TCC apply & release concerns
Control Valve • TCC codes • Burnt converter
• B2 Brake clutches burned
• Delayed Reverse Replace with Sonnax Part No.
57917E-03K
NOTE: Vacuum testing of lockup control
• Delayed engagement in plunger assembly not possible while in casting.
manual 1st Perform visual inspection to identify wear.
B3 Orifice
Control Valve B1 (2nd)
• Shift concerns Control Valve
• UD/B3 Brake clutches burned • B1 Brake clutches burned
Replace with Sonnax Part No. • Slipping/Flares in 2nd,
27741-16K 4th & 5th
Requires F-15741-TL18 & VB-FIX
NOTE: Stroke valve to ensure it’s not stuck.
Accumulator
Secondary
Pressure
Control Valve Regulator Valve
• Shift concerns
• Burnt clutches & brakes
• TCC apply & release
concerns
• TCC codes • Lube failures
• Burnt converter
C0 (Direct) Replace with Sonnax Part No.
Control Valve
• C0 Clutch burned 57917E-16K
Requires F-57917E-TL16 & VB-FIX
• Slipping/Flares in 3rd,
4th & 5th
C1 (Forward)
C0 (Direct) Control Valve
Accumulator Piston • C1 Clutch burned
• Delayed engagement • Delayed engagement
• Flare shifts • Forward slip • Slipping/Flares in 1st,
2nd & 3rd
• Burnt clutches
NOTE: Seal these ports and test on
Replace with Sonnax Part No. opposite side.
57917E-19K
B1 (2nd) Accumulator Piston Solenoid C1 (Forward) Accumulator Piston
• Delayed engagement • Flare shifts Relay Valve • Delayed engagement • Flare shifts
• Forward slip • Burnt clutches • Forward slip • Burnt clutches
• Shift concerns
Replace with Sonnax Part No. 57917E-19K Replace with Sonnax Part No. 57917E-19K
©2020 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company U151E-U250E-VacTestGuide 10-02-20
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com Page 3
Toyota/Lexus U151E, U151F, U250E
U151E-U250E-ZIP
Critical Wear Areas & Vacuum Test Locations Drop-In Zip Valve™
Parts Available Zip Kit® Available
NOTE: OE valves are shown in rest position and should be tested in rest position unless otherwise indicated. Test locations are pointed to with an arrow.
Springs are not shown for visual clarity. Low vacuum reading indicates wear and Sonnax parts are noted for replacement.
Upper Valve Body – Top Side 20
15
10
For specific vacuum test information, refer to individual part
instructions included in kits and available at www.sonnax.com.
U250E Shown Here
25 5
30 0
VACUUM
TEST
Click on Sonnax part numbers to see more information.
Lockup Control Valve
• TCC apply & release concerns
• TCC codes
• Burnt converter
Replace with Sonnax Part No.
27741-25K Requires F-27741-TL25 & VB-FIX
NOTE: Place
clay here to
isolate circuit.
C1 (Forward) Control Valve
• C1 Clutch burned
• Delayed engagement
• Slipping/Flares in 1st, 2nd & 3rd
NOTE: Seal ports on opposite side when testing.
©2020 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company U151E-U250E-VacTestGuide 10-02-20
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com Page 4
Toyota/Lexus U151E, U151F, U250E
OE Exploded View
Upper & Lower Valve Body • U250E Shown Here
Installed on Top Side
Upper Valve Body Descriptions
Upper Valve Body
I.D. No. Description Bottom Side Shown
201 Lockup Relay Valve 211
Lockup Control Valve & Plunger 201
202 210
Valve Assembly
203 B1 Control Valve 202
204 Secondary Regulator Valve 209 203
205 C1 Control Valve 208
206 Solenoid Relay Valve 204
207
207 C0 Control Valve
205
208 Accumulator Control Valve
209 B3 Orifice Control Valve 206
210 B2 Control Valve
Accumulator Pistons
211 Solenoid Modulator Valve Installed on Top Side
212 C0 Accumulator Piston
213 B1 Accumulator Piston
214 C1 Accumulator Piston
213
212
214
Lower Valve Body
Installed on Top Side Shown
Lower Valve Body Descriptions Bottom Side 101
I.D. No. Description 102
101 Manual Valve
103
102 B2 Switch Valve & Plunger Valve
104
103 4-5 Shift Valve
B1 Switch Valve & Plunger
104 105
Valve Assembly
Main Pressure Regulator Valve 106
105
& Boost Valve Assembly
106 Clutch Apply Control Valve
©2020 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company U151E-U250E-VacTestGuide 10-02-20
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com Page 5
