U151E U250E Vac Locations

: Sonnax U151E-U250E-Vac-Locations U151E-U250E-Vac-Locations 446 file tech_resource uploads

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Toyota U151E/F, U250E

Zip Kit® U151E-U250E-ZIP Available for this unit.

TIME TESTED • INDUSTRY TRUSTED

Critical Wear Areas & Vacuum Test Locations
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.

20

15

10

25

5

0
30
VACUUM
TEST

Lower Valve Body – Bottom Side • U
 250E Shown Here
Click on Sonnax part numbers to see more information.
4-5 Shift Valve

B2 (Low/Reverse) Switch Valve

•	Delayed 3rd gear
•	Burned UD/C3 clutch
•	Delayed or no 5th gear

•	Burned B2 brake
•	Delayed reverse
•	Loss of engine braking in manual low

B2 (Low/Reverse) Apply
Control Plunger
•	Burned B2 brake
•	Delayed reverse
•	Loss of engine braking in manual low
Replace with Sonnax Part No.
27741-06K

B1 (2nd) Apply
Control Plunger
•	Burned B1 brake
•	2-3 or 4-3 Bind-up
•	Harsh 1-4 shifts
Replace with Sonnax Part No.
27741-04K
NOTE: Seal port on opposite side when testing.

Boost Valve
•	Insufficient line rise in drive ranges
•	Soft shifts
•	Higher than normal reverse pressure
Replace with Sonnax Part No.
27741-01K

Clutch Apply Control Valve
•	Shift flares & bind-ups
•	Burned forward/C1 clutch, direct/C0 clutch
& 2nd/B1 brake
Replace with Sonnax Part No.
27741-18K Requires F-27741-TL18 & VB-FIX
NOTE: Stroke valve to ensure it is not stuck.

©2014 Sonnax Industries, Inc.
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com

U151E-U250E-Vac-Locations 01-30-14
Page 1

Toyota U151E/F, U250E

Zip Kit® U151E-U250E-ZIP Available for this unit.

TIME TESTED • INDUSTRY TRUSTED

Critical Wear Areas & Vacuum Test Locations

20

15

10

25

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 noted for replacement.

5

0
30
VACUUM
TEST

Lower Valve Body – Bottom Side • U
 250E Shown Here
Click on Sonnax part numbers to see more information.

End Plugs, Multiple Locations

B2 (Low/Reverse) Switch Valve

•	Oil pressure loss
•	Shift, engagement & converter complaints

•	Burned B2 brake
•	Delayed reverse
•	Loss of engine braking in manual low

Replace with Sonnax Part No.
27741-20K
NOTE: Two Locations =



Pressure Regulator Valve
•	Low/High line pressure
•	Soft/Harsh shifts
•	Clutch & brake failures
•	Higher than normal reverse pressure
•	Low converter pressure
Replace with Sonnax Part No.
27741-08K Requires 57917E-TL8



Clutch Apply Control Valve
•	Shift flares and bind-ups
•	Burned forward/C1 clutch, direct/C0 clutch
& 2nd/B1 brake



Replace with Sonnax Part No.
27741-18K Requires F-27741-TL18 & VB-FIX
NOTE: Stroke valve to ensure it is not stuck.

B1 (2nd) Apply
Control Plunger
•	Burned B1 brake
•	2-3 or 4-3 Bind-up
•	Harsh 1-4 shifts
Replace with Sonnax Part No.
27741-04K
NOTE: Seal this port and test on opposite side.

©2014 Sonnax Industries, Inc.
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com

U151E-U250E-Vac-Locations 01-30-14
Page 2

Toyota U151E/F, U250E

Zip Kit® U151E-U250E-ZIP Available for this unit.

TIME TESTED • INDUSTRY TRUSTED

Critical Wear Areas & Vacuum Test Locations

20

15

10

25

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.

5

0
30
VACUUM
TEST

Upper Valve Body – Bottom Side • U
 250E Shown Here
Click on Sonnax part numbers to see more information.
End Plugs, Multiple Locations

Solenoid Modulator
Valve

•	Oil pressure loss
•	Shift, engagement & converter complaints

•	Harsh/Flare upshifts
•	TCC slip or RPM cycling
•	Loss of cooler flow/
overheating

Replace with Sonnax Part No.
27741-20K



NOTE: Eight locations =

Replace with Sonnax Part No.
27741-13K
Requires F-27741-TL13

& VB-FIX

B2 (Low/Reverse)
Control Valve



•	Burned B2 brake
•	Delayed reverse
•	Delayed engagement in
manual 1st

B3 Orifice Control
Valve
•	Burned UD/B3 brake
•	Shift complaints

Lockup Relay Valve





B1 (2nd)
Control Valve

Replace with Sonnax Part No.
27741-16K
Requires F-15741-TL18

•	Burned B1 brake
•	Slipping/Flares in 2nd,
4th & 5th

& VB-FIX

NOTE: Stroke valve to ensure it is
not stuck.

Accumulator
Control Valve







•	Shift complaints
•	Burned clutches/brakes

Secondary Pressure
Regulator Valve
•	Harsh lockup
•	Converter apply/release
complaints
•	Burnt converters
Replace with Sonnax Part No.
57917E-16K Requires

C0 (Direct)
Control Valve
•	Burned C0 clutch
•	Slipping/Flares in 3rd,
4th & 5th

•	TCC apply/release problems
•	Converter codes
•	Burnt converters/overheating





•	Burned C0 clutch
•	Slipping/Flares in 3rd,
4th & 5th
Replace with Sonnax Part No.
57917E-19K

C1 (Forward)
Accumulator Piston

B1 (2nd)
Accumulator Piston

Replace with Sonnax Part No.
57917E-19K
©2014 Sonnax Industries, Inc.
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com

C1 (Forward)
Control Valve
•	Burned C1 clutch
•	Delayed engagements
•	Slipping/Flares in 1st,
2nd & 3rd
NOTE: Seal these ports and test on
opposite side.

C0 (Direct)
Accumulator Piston

•	Burned B1 brake
•	Slipping/Flares in 2nd,
4th & 5th

F-57917E-TL16 & VB-FIX

Solenoid Relay Valve
•	Shift complaints

•	Burned C1 clutch
•	Delayed engagements
•	Slipping/Flares in 1st,
2nd & 3rd
Replace with Sonnax Part No.
57917E-19K

U151E-U250E-Vac-Locations 01-30-14
Page 3

Toyota U151E/F, U250E

Zip Kit® U151E-U250E-ZIP Available for this unit.

TIME TESTED • INDUSTRY TRUSTED

Critical Wear Areas & Vacuum Test Locations
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.

20

15

10

25

5

0
30
VACUUM
TEST

Upper Valve Body – Top Side • U250E Shown Here

C1 (Forward) Control Valve
•	Burned C1 clutch
•	Delayed engagements
•	Slipping/Flares in 1st, 2nd and 3rd
NOTE: Seal ports on opposite side when testing.

©2014 Sonnax Industries, Inc.
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com

U151E-U250E-Vac-Locations 01-30-14
Page 4

Toyota U151E/F, U250E

Zip Kit® U151E-U250E-ZIP Available for this unit.

TIME TESTED • INDUSTRY TRUSTED

OE Exploded View
Upper & Lower Valve Body • U250E Shown Here

Installed on Top Side

Upper Valve Body Descriptions

I.D. No.

Description

201

Lockup Relay Valve

202

Lockup Control Valve & Plunger
Valve Assembly

203

B1 Control Valve

204

Secondary Regulator Valve

205

C1 Control Valve

206

Solenoid Relay Valve

207

C0 Control Valve

208

Accumulator Control Valve

209

B3 Orifice Control Valve

210

B2 Control Valve

211

Solenoid Modulator Valve

212

C0 Accumulator Piston

213

B1 Accumulator Piston

214

C1 Accumulator Piston

Upper Valve Body
Bottom Side Shown

211

201

210

202
209

203
208
204

207
205
206
Accumulator Pistons
Installed on Top Side

213
214

Lower Valve Body Descriptions

I.D. No.

Description

101

Manual Valve

102

B2 Switch Valve & Plunger Valve

103

4-5 Shift Valve

104

B1 Switch Valve & Plunger
Valve Assembly

105

Main Pressure Regulator Valve
& Boost Valve Assembly

106

Clutch Apply Control Valve

Installed on
Bottom Side

©2014 Sonnax Industries, Inc.
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com

212

Lower Valve Body
Top Side Shown

101

102
103
104
105
106

U151E-U250E-Vac-Locations 01-30-14
Page 5



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