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  • Lube failures
  • TCC apply & release concerns
  • TCC codes


Excessive valve to bore clearance


The Sonnax TCC lockup clutch regulator kit salvages the worn valve body by restoring the hydraulic integrity of the TCC lockup clutch regulator circuit.


Oversized TC Lockup Clutch Regulator Valve Kit
Part No. 68942-10K

You need this if... View Instructions

Excessive clearance at the outboard spool fed by the PWM solenoid allows modulating lube to exhaust. The resulting pressure loss causes reduced TC lockup clutch apply pressure, creating TCC-related complaints. Bore wear at the inboard spool can contribute to reduced line pressure. The Sonnax kit 68942-10K salvages the valve body with an oversized hard-anodized valve and a custom spring.

  • Oversized valve salvages valve bodies with worn TC lock-up clutch regulator valve bore.
  • Kit restores normal converter charge and cooler flow.
  • Valve design corrects harsh or no TCC apply, TCC slipping and burn-up.
  • Valve
  • Spring

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 thumb

December 30, 2013

Mercedes 722.6 Vacuum Test Guide

Topics: Vacuum Testing Vacuum Test Guides Transmission Mercedes 722.6 Transmission

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  • 68942 10k combo
  • 68942 10k part

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.

  • 68942 10k in test