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.

A340 • A340E • A340F • A340H

Boost Valve Kit 97855-30K

Fits Type 1 (8931 casting code) with .546" dia. large spool.

Helps cure:

Delayed engagement
Low line rise
Low line pressure in Reverse
High line pressure in Reverse
Erratic line pressure
Soft upshifts
Repeated clutch failure

Honda, Acura 4-Speed, 3-Shaft • Honda, Acura 5-Speed

O-Ringed End Plug 98892-01

Fits units with dual linear solenoids only.

Helps cure:

Various concerns depending on location of leaking end plug
Low CPC Pressure
Low cooler flow

A340 • A340E • A340F • A340H

Lockup Relay Valve Sleeve Kit 97855-27K

Fits '84-'00, replaces 3 spool lockup relay valves in units with 3 or fewer solenoids, type 1 (8930 casting code).

Helps cure:

No lockup
Overheated converter
Overheated fluid
Low cooler flow

4L60 • 4L60-E • 4L65-E • 4L70-E

Servo Release Check Valve Kit 77701-076

2nd Gear Servo Release

Helps cure:

Reduced 3-4 clutch life
2-3 Shift feel poor
3-2 Bind-up

4L60 • 4L60-E • 4L65-E • 4L70-E

Pinion Gear 77731-01

Rear Planetary

Helps cure:

Planetary failure
Planetary wear

4R70E • 4R70W • 4R75E • 4R75W • AODE

Oversized Bypass Clutch Control Valve 76948-31

Helps cure:

Code 628, 741, 1741, 1744
No lockup
TCC slip
Low cooler flow

4L60 • 4L60-E • 4L65-E • 4L70-E • Powerglide • TH350C • TH400

Stator Support Bushing 35007A

Bushing Style: Precision
Material: Steel-backed copper alloy
Width: 0.500"
Housing Bore: 1.121"
Inner Dia.: 1.004"
Shaft Dia.: 1.002"

Helps cure:

Bushing wear
Bushing failure

4T80-E

3-4 Accumulator Piston 72872-01

Helps cure:

Worn accumulator piston pin bore
Damage from broken spring
4-3 Kickdown
2-3 Soft
3rd Clutch distress

4L60-E • 4L65-E • 4L70-E

3-2 Control Valve Spring 77754-23

For use in '96-later on/ff style 3-2 control valve bodies. It will not work in '93–'95 PWM style 3-2 control valve bodies.

Helps cure:

Broken 3-2 control valve spring
3-2 Bind-up
Overheated 2-4 band

01J • 01T

Tool Kit F-33741B-TL4

AOD

Governor Circuit End Plug Kit 76999-04K

Fits mid '83-earlier units.

Helps cure:

Erratic shift timing
Oil leaks

4R70E • 4R70W • 4R75E • 4R75W • AODE

Elevated Pressure Regulator Valve Kit 76948-12K

Fits '96-later units.

Helps cure:

Soft shifts
Poor shift quality
Low base line pressure
Delayed Forward
Forward clutch failure

4T60 • 4T60-E

Modulated Line Boost Valve Kit 84754-17K

High Ratio, .199" dia. small spool

Helps cure:

Low line rise
Soft shifts
2nd Clutch distress
3rd Clutch distress

200-4R • 4L60 • 4L60-E • 4L65-E • 4L70-E • 5L40-E • 5L50-E • Powerglide

Bushing 77005T

Bushing Style: Precision
Material: Bimetal, PTFE-lined

Helps cure:

Worn pump bushing

AOD

Boost Valve Kit 76990K

O-Ring Style

Helps cure:

Soft slide shifts
Delayed Reverse
Low line rise
Direct clutch failure

↑