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

Symptoms:

Erratic line pressure
Poor shift quality
Burnt clutches
Low converter & lube flow
Overheating
TCC apply & release concerns

Cause:

Continuous oscillation of the pressure regulator valve results in excess bore wear, causing erratic line pressure and/or restricting converter feed oil.

Correction:

Recover hydraulic control and renew line pressure performance by reconditioning the bore and installing Sonnax oversized pressure regulator valve kit.

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

Oversized Pressure Regulator Valve Kit
Part No. 124740-60K

Tooling:

F-124740-TL60
VB-FIX

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GM Gen. 2 6T70, 6T75 and 6T80 transmissions may exhibit multiple line pressure and converter-related problems due to excess wear in the main pressure regulator bore. Wear at the balance spool end allows critical fluid loss, resulting in excess line pressure, harsh shifts and overheating due to reduced cooler/converter flow. Wear at the outboard spool robs converter feed pressure and lowers line pressure, resulting in soft shifts and burnt clutches.

Reconditioning the bore and installing Sonnax oversized pressure regulator valve kit 124740-60K will restore hydraulic integrity for proper line pressure control in all ranges.

Oversized pressure regulator valve and matched spring restore OE function
Extended valve land for better sealing
Hardcoat anodized aluminum valve combats premature wear

Contents

Valve
End Plug

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.