Tool Required VB-FIX Required

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

A worn pressure regulator bore and/or valve.

Correction:

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

Tool Required VB-FIX Required

722.6

Oversized Pressure Regulator Valve Kit

Part No.

68942-07K

Oversized Pressure Regulator Valve Kit
  • 68942-07k_combo

  • Oversized Pressure Regulator Valve Kit

Small_68942-07k_combo Small_68942-07k

722.6

Oversized Pressure Regulator Valve Kit

Part No. 68942-07K

  • Valve
  • Inner Spring
  • Outer Spring

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

Complaint:

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

Cause:

A worn pressure regulator bore and/or valve.


Correction:

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

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. The Sonnax 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.

Required Tools

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.

  • Test Locations

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Valve Body Layouts

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.

Valve Body Layout Mercedes 722.6

Related Tech Articles

Sonnax

Mercedes 722.6 Vacuum Test Guide

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