Transmission Parts GM 6L90 6L80 6L50 6L45 Valve Body Spring

Symptoms:

Code P0751
1-2-3-4 Clutch burned
3-5-Reverse clutch burned
Cruise control disabled

Cause:

These symptoms can be caused by faulty OE clutch select valve springs, setting the valve apply pressure too high.

Correction:

Sonnax springs reduce the apply pressure needed to move the clutch select valves, reducing the tendency of the P0751 code to set.

6L45, 6L50, 6L80, 6L90

Clutch Select Valve Spring Kit
Part No. 104740-02K

Fits mid '10–earlier. Compatible with all models except early, 1st design 6L80 plate 24246916.

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Mid 2010-earlier GM 6L45/50/80/90 transmissions have a tendency to set a P0751 (shift solenoid 1 malfunction) code. One of the causes of this is the OE spring force at the clutch select valves inhibiting movement of the valves, affecting proper control of clutch apply fluid.

Early-model production has updates made to reduce the spring force. However the updated springs are not available separately from OE, only as part of a new and expensive lower valve body.

Sonnax clutch select valve spring kit 104740-02K updates these springs to the correct lower load to prevent the P0751 code.

No special tools required
Avoids expensive lower valve body replacement

Note

Additionally, updates were made to the OE separator plate to further improve clutch feed pressure, clutch backfill exhaust pressure and compensator feed pressure.

If the unit's separator plate is NOT the updated version, Sonnax recommends replacing the plate with the updated version when using this spring kit.

See instructions for details.

Contents

Springs (2)

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.