Transmission Parts

Sonnax Line Pressure Booster Kit for 4L60-E, 4L65-E, 4L70-E The 4L60E-LB1 Line Pressure Booster Kit is expertly designed to fit early-style GM 4L60...

Sonnax Zip Kit for U140E, U140F, U240E, U241E Valve Bodies The Sonnax Zip Kit U140E-U241E-ZIP is specifically designed to address the root causes o...

Sonnax Zip Kit for 6T70 and 6T75 Transmissions (2007-2012) The Sonnax Zip Kit 6T70-ZIP is specifically designed to address the root causes of vari...

Sonnax Zip Kit for 6F50 and 6F55 Valve Bodies The Sonnax Zip Kit 6F50-ZIP is expertly crafted to tackle the root causes of various issues in Ford 6...

Sonnax CPC Valve Spring for A4RA, B4RA, M4RA Transmissions (1996-1999) For Honda/Acura A4RA, B4RA, and M4RA transmissions from 1996 to 1999, harsh ...

Sonnax Oversized Solenoid Regulator Valve for VW/Audi Transmissions Designed to address common wear and tear issues in VW/Audi 096, 097, 098, 01M, ...

Boost Valve Kit for 4L30-E Medium Ratio, OE Code 448 In GM 4L30-E units, the original equipment (OE) boost valves are constructed from steel, while...

Designed for VW/Audi 01M, 01N, and 01P Transmissions The Problem: In VW/Audi 01M, 01N, and 01P transmissions, constant valve oscillation causes the...

The Heavy Duty 1-2-3-4 Piston for 6L80, 6L90 Transmissions From Sonnax Compatibility: Fits 2006–2007 units using OE part number 24224146 Fits 2007...

Sonnax E1/E2 Clutch Drum Bushing for AL4 DPO Excessive wear or improper tolerances in OE bushings can result in vital line pressure loss, leading t...

Sonnax TC Check Valve Kit for Honda/Acura 4-Speed, 3-Shaft, and 5-Speed Transmissions The Sonnax TC Check Valve Kit is designed to address common i...

Line Pressure Booster Kit for 4R70E, 4R70W, 4R75E, 4R75W, AODE The AODE/4R70W line rise control operates differently compared to most units. In thi...

Boost Valve Kit Sonnax (Except 3.0) 4F50N AX4N AX4S AXOD AXODE Vehicles with Ford AXOD, AXODE, AX4S or AX4N transmissions frequently have flare 1-2...

Boost Valve Kit 4R44E, 4R55E, 5R44E, 5R55E From Sonnax Ford 4R44E, 4R55E, 5R44E, and 5R55E units are often plagued by issues such as soft shifts, d...

Sonnax TCC Regulator & Isolator Valve Kit for 4L60E, 4L65E, 4L70E The Sonnax TCC Regulator and Isolator Valve Kit 77754-04K is designed to addr...

Sonnax Accumulator Piston Kit for 40TE, 40TES, 41AE, 41TE, 41TES, 42LE, 42RLE, 45RFE, 545RFE, 62TE, 65RFE, 66RFE, 68RFE Accumulator piston scuffing...

Sonnax Line Pressure Booster Kit for TH400 The Sonnax Line Pressure Booster Kit for the TH400 transmission is designed to enhance your vehicle’s pe...

Sonnax Line Pressure Modulator Plunger Valve Kit for E4OD 4R100 In some Ford E4OD and 4R100 transmissions, issues such as soft 1-2 or 2-3 shifts, i...

Sonnax Case Saver Retainer for TH400 & '98-Earlier 4L80-E The Sonnax case saver retainer 34762-10 is the only intermediate clutch retaining rin...

Sonnax Secondary Pulley Bearing for Cover Side For F011E, RE0F10A, F1CJA Transmissions The Sonnax secondary pulley bearing (part number 33229N) is ...

Sonnax Planetary Rebuild Kit for 4L80-E, TH400 Transmissions Optimize the performance of your TH400 or '98-earlier 4L80-E transmission with the Son...