Transmission Parts

Browse all Sonnax transmission parts here, or use the filters below to find just what you are looking for.

Find a Distributor

Looking for Part Instructions?

View Sonnax Part Instructions

Enter a Sonnax part number below to view its instructions. For general reaming instructions, click here.

4R70W • AODE

Main Pressure Regulator Valve 76948-01

Replaces '95-Earlier 4-spool valves only. DOES NOT replace 3-spool valves.

Helps cure:

Poor shift quality
Soft shifts
Low line rise
Erratic buzz
Premature clutch failure
Premature band failure
Uncontrolled pressure in Reverse
Low Reverse boost

5R55S • 5R55W

Remanufactured Solenoid Block 56954K-RRP

Fits '02–'03. If supplying a core for your solenoid, please order 56954K-RRP. If no core available, please order 56954K-C.

Helps cure:

Shift concerns

U140E • U140F • U240E • U241E

Solenoid Modulator Valve Kit 57917E-13K

Helps cure:

Slips & flares
Harsh upshifts
Bind-up
Harsh Reverse
TCC cycling
TCC slip
Excess Reverse pressure & distorted housings
Low cooler flow
Overheating

U140E • U140F • U240E • U241E

Boost Valve Kit 57917E-01K

Helps cure:

Soft shifts
Low line rise in Drive
High line pressure in Reverse

09D • TR-60SN

Lockup Clutch Control Valve Kit 25741-29K

Helps cure:

TCC codes
TCC apply & release concerns
RPM surge on coast
Harsh downshifts
Overheated fluid

55-50SN • 55-51SN

Shift Pressure Control Valve Kit 59947-38K

Also fits AF23/33 and RE5F22A.

Helps cure:

2-3 Harsh
3-4 Harsh
No 5th
4-5 Harsh
Low Reverse pressure
C2 Clutch burned
B1 Clutches burned
B2 Clutches burned
High line pressure in Reverse

RE5R05A

Oversized Cooler Bypass Valve Kit 63741-07K

Also fits Hyundai/Kia A5SR1/2 and Subaru 5EAT.

Helps cure:

Overheated fluid
Damaged parts & planetaries
Overheated converter
Burnt parts & planetaries
Premature lockup
Inadequate lubrication

722.6

Oversized 2-3 Overlap Control Valve Kit 68942-27K

Helps cure:

2-3 Flare
2-3 Bump
2-3 Harsh
Slipping gears

CD4E • LA4A-EL

2-4 Accumulator Piston Kit 73840-24

Helps cure:

1-2 Bump
3-4 Bump
Soft shifts
Harsh shifts

CD4E • LA4A-EL

Master Kit 73840-MK

Helps cure:

Code 28, 1744, 1740
High line pressure
Cracked drum
Planetary failure
Bushing failure
Loss of lube oil
No cooler flow during failsafe

CD4E • LA4A-EL

Oversized Pressure Regulator & Converter Regulator Valve Kit 73840-RK

Helps cure:

Code 28, 1744, 1740
High line pressure
Cracked drum
Planetary failure
Bushing failure
Loss of lube oil
No cooler flow during failsafe

4R70E • 4R70W • 4R75E • 4R75W • AODE

Bypass Clutch Control Plunger Valve Kit 76948-04K

Single .030" orifice sleeve design.

Helps cure:

Shudder
Code 628
No lockup
TCC apply & release concerns
Delayed lockup

4R70E • 4R70W • 4R75E • 4R75W • AODE

Main Pressure Regulator Valve 76948-09

Fits '96-later units.

Helps cure:

Poor shift quality
Soft shifts
Low line rise
Erratic buzz
Premature clutch failure
Premature band failure
Low Reverse boost
Uncontrolled pressure in Reverse

4R70W • AODE

Oversized Pressure Regulator & Boost Valve Kit 76948-16K

Fits '95-earlier only.

Helps cure:

Uncontrolled pressure in Reverse
Soft shifts
Delayed Reverse
Low line rise
Throttle buzz
Erratic Reverse pressure
Clutch failure
Band failure
Damaged case

4R70E • 4R70W • 4R75E • 4R75W • AODE

Oversized Pressure Regulator & Boost Valve Kit 76948-17K

Fits '96-later only.

Helps cure:

Uncontrolled pressure in Reverse
Soft shifts
Delayed Reverse
Low line rise
Throttle buzz
Erratic Reverse pressure
Clutch failure
Band failure
Damaged case

↑