• Harsh lockup


Wear at the TCC damper valve bore allows signal pressure to leak, resulting in harsh TCC apply.


Sonnax drop-in TCC damper valve kit restores hydraulic sealing.


TCC Damper Valve Kit
Part No. 68942-23K

In late-style units only. Early-style units do not have TCC damper valve.

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

Late-style Mercedes 722.6 valve bodies added a TCC damper valve at a previously vacant bore in the casting. This damper valve acts like an accumulator for the converter clutch. If there is leakage due to bore wear, signal oil can leak to exhaust, resulting in harsh TCC apply and lock-up. Sonnax TCC damper valve kit 68942-23K restores hydraulic integrity.

  • The highly wear-resistant sleeve incorporates O-rings to seal against previous bore wear, without the need to ream the bore
  • Annular grooves have been added to the Sonnax valve to better center the valve and prevent future wear
  • Drop-in Zip Valve parts install quickly and easily
Learn More About Zip Valve™ Drop-In Repairs
  • Valve
  • Sleeve
  • Spring
  • Retainer Ring
  • O-Rings (2)

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.

Mercedes 722.6 Valve Body Layout

Mercedes 722.6 Valve Body Layout
  • 722.6 TCC Damper Valve Kit 68942-23K
  • 722.6 TCC Damper Valve Kit 68942-23K

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.

722.6 TCC Damper Valve Kit Vacuum Test Locations