Symptoms:

  • High TCC slip RPM
  • Code P0218
  • Code P0741
  • Overheated converter
  • Inadequate lubrication
  • Excess converter pressure

Cause:

Converter feed limit bore wear or stuck converter feed limit valve can result in overheat, incorrect TCC apply/release, inadequate lube and cooling and other problems.

Correction:

Recover hydraulic control and renew TCC and lube performance by reconditioning the bore and installing Sonnax oversized converter feed limit valve.

6L45, 6L50, 6L80, 6L90

Oversized Converter Feed Limit Valve
Part No. 104520-11


You need this if... View Instructions Find a Distributor

GM 6L45, 6L50, 6L80, 6L90 units may have TCC apply and release problems. Bore wear or a stuck converter feed limit valve can result in converter overheat, incorrect TCC apply or release, inadequate lube and cooling, and converter over-pressurization. Reaming the bore and installing the Sonnax oversized converter feed limit valve 104520-11 will restore proper valve function, resulting in proper TCC apply and release, regaining control of lube and cooling.

  • Valve is hardcoat anodized to reduce wear
  • Annular groove helps center the valve in bore

Use of the VB-06 is required with the VB-FIX reaming fixture for this installation unless the stator support shaft is removed from the pump body.

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 Oversized Converter Feed Limit Valve 104520-11
  • 6L45, 6L50, 6L80, 6L90 Oversized Converter Feed Limit Valve 104520-11

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

NOTE: Must test with actuator feed limit (AFL) valve installed instead of converter limit valve. Position AFL valve so spool face and port face are flush as indicated.

6L45, 6L50, 6L80, 6L90 Oversized Converter Feed Limit Valve Vacuum Test Locations
6L45, 6L50, 6L80, 6L90 Oversized Converter Feed Limit Valve Vacuum Test Locations