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  • Slip codes
  • No 2-3
  • 4-3 Neutral
  • Soft shifts under acceleration
  • Delayed engagement
  • No lockup


A worn pressure regulator bore and/or valve.


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


Oversized Pressure Regulator Valve Kit
Part No. 68942-07K

Fits bores containing OE PR valve with .512" dia. spool only.

You need this if... View Instructions

Excessive valve-to-bore clearance at the modulating pressure area allows modulated solenoid feed pressure to exhaust, reducing line pressure and creating shift-related complaints. Bore wear at the inner spool results in high line pressure conditions. Sonnax oversized pressure regulator valve kit 68942-07K salvages the valve body with an oversized hard-anodized valve and recalibrated springs.

  • Outer spool has extended length for better support.
  • Aluminum valve has been hard-anodized to prevent excessive wear.
  • Valve spools have annular grooves to prevent wear due to side loading.
  • Valve
  • Inner Spring
  • Outer 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

Read Now
  • 68942 07k combo
  • 68942 07k

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 07k in test