Toyota U151E/F, U250E                                   Zip Kit® U151E-U250E-ZIP Available for this unit.
TIME TESTED • INDUSTRY TRUSTED
Critical Wear Areas & Vacuum Test Locations                                                                                                     20
                                                                                                                                               25
                                                                                                                                                30
                                                                                                                                                     15
                                                                                                                                                        0
                                                                                                                                                          10
                                                                                                                                                               5
Note: OE valves are shown in rest position and should be tested in rest position unless otherwise indicated. Test locations are pointed to       VACUUM
                                                                                                                                                   TEST
with an arrow. Springs are not shown for visual clarity. Low vacuum reading indicates wear.
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 B2 brake
                                                  •	Burned UD/C3 clutch                            •	Delayed reverse
                                                  •	Delayed or no 5th gear                         •	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.                                                                                    U151E-U250E-Vac-Locations 01-30-14
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com                                                                                     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
                                                                                                                                                    25
                                                                                                                                                     30
                                                                                                                                                          15
                                                                                                                                                             0
                                                                                                                                                               10
                                                                                                                                                                    5
Note: OE valves are shown in rest position and should be tested in rest position unless otherwise indicated. Test locations are pointed to            VACUUM
                                                                                                                                                        TEST
with an arrow. Springs are not shown for visual clarity. Low vacuum reading indicates wear and Sonnax parts noted for replacement.
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                                                                               •	Burned B2 brake
 •	Shift, engagement & converter complaints                                                        •	Delayed reverse
 Replace with Sonnax Part No.                                                                      •	Loss of engine braking in manual low
 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.                                                                                     U151E-U250E-Vac-Locations 01-30-14
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com                                                                                          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
                                                                                                                                                       25
                                                                                                                                                        30
                                                                                                                                                             15
                                                                                                                                                                0
                                                                                                                                                                  10
                                                                                                                                                                       5
Note: OE valves are shown in rest position and should be tested in rest position unless otherwise indicated. Test locations are pointed to               VACUUM
                                                                                                                                                           TEST
with an arrow. Springs are not shown for visual clarity. Low vacuum reading indicates wear.
Upper Valve Body – Bottom Side • U
                                  250E Shown Here
  Click on Sonnax part numbers to see more information.
                                                                                                            End Plugs, Multiple Locations
 Solenoid Modulator                                                                                         •	Oil pressure loss
 Valve                                                                                                      •	Shift, engagement & converter complaints
 •	Harsh/Flare upshifts                                                                                     Replace with Sonnax Part No.
 •	TCC slip or RPM cycling                                                                                  27741-20K
 •	Loss of cooler flow/
   overheating
                                                                                                            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
                                                                                                                          Lockup Relay Valve
                                                                                                                           •	TCC apply/release problems
 •	Delayed engagement in                                                                                                   •	Converter codes
   manual 1st                                                                                                              •	Burnt converters/overheating
 B3 Orifice Control                                                                                                
 Valve
 •	Burned UD/B3 brake
 •	Shift complaints
                                                                                                                          B1 (2nd)
 Replace with Sonnax Part No.                                                                                              Control Valve
 27741-16K                                                                                                                 •	Burned B1 brake
 Requires F-15741-TL18     & VB-FIX                                                                                        •	Slipping/Flares in 2nd,
                                                                                                                             4th & 5th
 NOTE: Stroke valve to ensure it is
 not stuck.
                                                                                                                          Secondary Pressure
                                                                                                                           Regulator Valve
 Accumulator
                                                                                                                          •	Harsh lockup
 Control Valve
 •	Shift complaints
 •	Burned clutches/brakes
                                                                                                                          •	Converter apply/release
                                                                                                                             complaints
                                                                                                                           •	Burnt converters
                                                                                                                           Replace with Sonnax Part No.
 C0 (Direct)                                                                                                               57917E-16K Requires
 Control Valve                                                                                                             F-57917E-TL16 & VB-FIX
 •	Burned C0 clutch                                                                                                
 •	Slipping/Flares in 3rd,
   4th & 5th                                                                                                              C1 (Forward)
                                                                                                                           Control Valve
                                                                                                                           •	Burned C1 clutch
 C0 (Direct)                                                                                                               •	Delayed engagements
 Accumulator Piston                                                                                                        •	Slipping/Flares in 1st,
 •	Burned C0 clutch                                                                                                          2nd & 3rd
 •	Slipping/Flares in 3rd,                                                                                                 NOTE: Seal these ports and test on
   4th & 5th                                                                                                               opposite side.
 Replace with Sonnax Part No.
 57917E-19K                                                                                                                C1 (Forward)
                                                                                                                           Accumulator Piston
 B1 (2nd)                                                                                                                  •	Burned C1 clutch
 Accumulator Piston                                                                                                        •	Delayed engagements
 •	Burned B1 brake                                                                                                         •	Slipping/Flares in 1st,
                                                                                       Solenoid Relay Valve                  2nd & 3rd
 •	Slipping/Flares in 2nd,
                                                                                       •	Shift complaints
   4th & 5th                                                                                                               Replace with Sonnax Part No.
                                                                                                                           57917E-19K
 Replace with Sonnax Part No.
 57917E-19K
©2014 Sonnax Industries, Inc.                                                                                     U151E-U250E-Vac-Locations 01-30-14
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com                                                                                             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                                                                                                      20
                                                                                                                                                25
                                                                                                                                                 30
                                                                                                                                                      15
                                                                                                                                                         0
                                                                                                                                                           10
                                                                                                                                                                5
Note: OE valves are shown in rest position and should be tested in rest position unless otherwise indicated. Test locations are pointed to        VACUUM
                                                                                                                                                    TEST
with an arrow. Springs are not shown for visual clarity. Low vacuum reading indicates wear.
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.                                                                                      U151E-U250E-Vac-Locations 01-30-14
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com                                                                                      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
                                                                                                                               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
©2014 Sonnax Industries, Inc.                                                                                        U151E-U250E-Vac-Locations 01-30-14
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com                                                                                      Page 5