Symptoms:

  • Soft shifts
  • Poor shift quality
  • Reverse shudder
  • Direct clutch failure
  • Low line rise

Cause:

Excess boost sleeve wear prevents proper line rise.

Correction:

Recover hydraulic control and renew line rise performance by installing Sonnax boost valve kit.

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.

C6 Boost Valve  Kit Vacuum Test Locations