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:

The Sonnax 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... View Instructions Find a Distributor

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 units, 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.

  • No special tools required
  • Springs (2) Short, .250"
  • Springs (2) Medium, .380"
  • Springs (2) Tall, .560"
  • Center Support Seal Inserts (4) Grooved & Threaded
  • Valve Body Seal Inserts (4) Non-Grooved & Non-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

GM 6L45, 6L50, 6L80, 6L90 Valve Body Layout
  • 6L45, 6L50, 6L80, 6L90 Center Support Seal Kit 104740-14K

You need this if...

The OE center support seals are compromised, or visual wear/damage is noted. Marred machined surface of the valve body.