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.

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

AOD

Retaining Ring 76811-01K

Direct Drum Shaft

Helps cure:

Restricted lube flow

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

AOD

O-Ringed End Plug Kit 76999-LRG

Helps cure:

Erratic shift timing
Oil leaks

ATX

Boost Valve Kit 86940-05K

Helps cure:

Low line rise in Reverse
Low line rise
No line rise
1-2 Flare
2-3 Flare
Delayed Reverse

4R100 • E4OD

Front Lube/Drainback Valve Kit 36425-01K

Melt-proof aluminum

Material: Aluminum

Helps cure:

OD planetary failure

6R100 • 6R60 • 6R75 • 6R80 (2009–2014) • 6R80 (2015-Later) • ZF6HP19 • ZF6HP26 • ZF6HP32

Oversized Bypass Clutch Control Valve Kit 95740-13K

OE valve name: WD-V

Helps cure:

TCC codes
Excess TCC slip
Cycling RPM
Low TCC release pressure
Flare shifts
Harsh shifts
Rough idle in Reverse
Overheated converter

4R100 • E4OD

Bore Sizing Tool 36948-12

Helps cure:

Soft shifts
No 2nd
No 3rd
No 4th
Premature clutch failure

AX4S • AXOD • AXODE

Low/Intermediate Servo Spring Retainer Clip 96945R

Helps cure:

2-3 Flare
Downshift clunk
Poor servo timing
Delayed Forward
No Forward

6R100 • 6R60 • 6R75 • 6R80 (2009–2014) • 6R80 (2015-Later) • ZF6HP19 • ZF6HP21 • ZF6HP26 • ZF6HP28 • ZF6HP32 • ZF6HP34

Oversized Converter Release Regulator Valve Kit 95740-05K

OE valve name: WK-V

Helps cure:

Excess TCC slip RPM & related codes
Harsh TCC apply & release
Low TCC release pressure
Rough idle in Reverse
Harsh downshifts
Flare shifts
Overheated converter

6R100 • 6R60 • 6R75 • 6R80 (2009–2014) • 6R80 (2015-Later) • ZF6HP19 • ZF6HP26 • ZF6HP32

Clutch A Control Boost Valve Kit 95740-21K

Helps cure:

5-4 Flare
5-4 Neutral
No 4-5
VFS 1/A solenoid control code
Delayed Forward
Harsh Forward

↑