Transmission Parts GM 6T70 (Gen. 2) 6T75 (Gen. 2) 6T80 (Gen. 2) Valve Body Valve / Sleeve

Symptoms:

Shift quality is not load sensitive
Harsh shifts
Slips & flares
Delayed engagement
Burnt clutches
Slide shifts
Slip codes

Cause:

Wear in clutch boost valve bores cause feedback pressure instability, preventing normal shift operation.

Correction:

Recover hydraulic control and renew shift performance by reconditioning the bore and installing Sonnax oversized clutch boost valve.

6T70 (Gen. 2), 6T75 (Gen. 2), 6T80 (Gen. 2)

Oversized Clutch Boost Valve
Part No. 124740-56

Fits any of three locations.

Tooling:

F-144740-TL22
VB-FIX

You need this if... View Instructions Find a Distributor

GM Gen. 2 6T70, 6T75 and 6T80 clutch boost valves provide feedback pressure to their respective clutch regulator valves, balancing the regulators to assist with apply and release of the associated clutch. Pressure control solenoid fluid acts on the boost valve to precisely control the amount of oil delivered to the balance end of the clutch regulator valve.

Excess wear in boost valve bores can result in harsh shifts, slipping, burnt clutches, flares, and delayed engagement. Reconditioning the bore and installing Sonnax oversized clutch boost valve 124740-56 restores the hydraulic control necessary for trouble-free shifting.

Hardcoat anodized aluminum valve combats premature wear
Oversized valve engineered to perform to OE specification

Note

Proper operation of clutch boost valves depends on correct pressure being supplied by shift solenoids. If trouble is found with pressure supply to these solenoids, Sonnax offers oversized AFL/solenoid regulator valve 124740-48K.

Valve Body Layout

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.