Symptoms:

  • Excess endplay

Cause:

After resurfacing the pump, a thicker washer than OE is needed to set correct endplay.

Correction:

Restore acceptable endplay by installing thicker Sonnax selective pump thrust washer.

6L45, 6L50, 6L80, 6L90

Selective Pump Thrust Washer
Part No. 33452A

Package Quantity: 3

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It is often necessary to resurface the pump during overhaul of GM 6L45, 6L50, 6L80 and 6L90 units. After resurfacing, endplay is too great and must be set back to an acceptable amount. However, there is no selective washer available from the OEM. Sonnax selective pump thrust washer 33452A is about .020" thicker than OE, enabling endplay to be brought back into specification after machining of the pump.

Front end play specification: .015"–.025"

  • Material: Nylon
  • Thickness: 0.080"

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 Selective Pump Thrust Washer 33452A
  • 6L45, 6L50, 6L80, 6L90 Selective Pump Thrust Washer 33452A details