March 08, 2023
GM 6L45/50, 6L80/90 No Movement Conditions: Analysis & Repair Tips
Jim Mobley
Symptoms:
- Burnt clutches
- Loss of lube oil
- Overheating & reduced lube feed
Cause:
Rubber face seals are prone to wear over time, allowing leakage of critical circuit pressure and loss of lube oil flow to occur.Correction:
Sonnax drop-in center support seal kit provides press-in-place steel inserts which bridge the leakage at the OE rubber face seals.6L45, 6L50, 6L80, 6L90
Center Support Seal Kit
Part No. 104740-14K
You need this if...
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The rubber seals between the center support in the case and the machined surface of the valve body are prone to leakage over time. In GM 6L45, 6L50, 6L80, 6L90 transmissions, this can result in continuous line pressure and lube flow loss, as well as clutch apply leakage in Reverse, 2nd and 6th. Installation of the Sonnax center support seal kit 104740-14K will prevent any leakage that occurs due to a gap between the rubber OE seals and the valve body or center support. Drop-in Zip Valve™ parts install quickly and easily.
Learn More About Zip Valve™ Drop-In Repairs- Valve Body Seal Inserts (4) Non-Grooved & Non-Threaded
- Springs (2) Short, .250"
- Springs (2) Medium, .380"
- Springs (2) Tall, .560"
- Center Support Seal Inserts (4) Grooved & Threaded
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.
GM 6L45, 6L50, 6L80, 6L90 Valve Body Layout
