6L80E / 6L90E New GM Transmission Control Module Programmed to your VIN upon arrival, Can be Custom tuned with our calibrations when purchased with our Custom Tuning.

GM 6L80E / 6L90E 1-2-3-4 pistons commonly crack due to cantilevered stress on the cast material. The OE part has been through several revisions in an attempt to correct this, but all OE versions are still chronically known to crack. Sonnax 1-2-3-4 piston 104984-01 is made from stronger, billet aluminum and has superior design refinements that add additional strength to prevent breakage and deliver maximum performance.

GM 6L45, 6L50, 6L80, 6L90 units incorporate a compensator feed regulator valve to assist the clutch return spring. Regulated compensator pressure is routed to the clutch drum to keep the piston in the released position when commanded off, counteracting residual apply fluid. Installing the Sonnax compensator feed regulator valve kit, with improved materials and valve support, will extend the service life of these units beyond that of the OE casting.

These Raybestos 6L80E/6L90E stage-1 clutches are a great choice street cars, heavy work trucks, and street/strip applications. This clutch module fits all 6L80E transmissions from 06 up and contain just the frictions for the entire unit. These clutches are double sided and keep the factory thickness.

The Sonnax apply ring increases surface area between the apply piston and OE waved clutch plate, resulting in more even distribution of apply force to clutch plates. The Sonnax backing plate minimizes flexing / bowing when clutch is applied, drastically reducing the likelihood of clutch plate distortion or coning.

6L80E Rear Planetary. TCS has redesigned the O.E. rear planetary assembly with a 4140 HTSR billet steel drive plate to eliminate spline/housing failure. The new drive plate is milled and contoured to the planetary housing to eliminate any possible separation when under load.

This Zip Kit fits 6L45E, 6L50E, 6L80E, and 6L90E transmissions and targets the root of multiple complaints by sealing the critical circuit pressure losses so common with this platform. This exclusive kit contains very uniquely designed components to prevent the loss of pressures with in the main line, clutch apply control, solenoid feed and lockup control circuits. This kit also corrects the multiple circuits that are known to suffer from end plug leakage or poor check ball sealing. There are absolutely no special tools required to install this kit.

Sonnax high-performance pump slide spring for GM 6L80E / 6L90E transmissions is able to hold the pump slide in a maximum-volume position to hold line pressure and prevent clutch failure, despite increased pressure and high engine speed.