• Code 628, 741, 1741, 1744
  • No lockup
  • TCC slip
  • Low cooler flow


Excessive wear at the bypass clutch control valve bore.


Ream the valve bore and install the Sonnax improved oversized valve to replace the OE version.

4R70E, 4R70W, 4R75E, 4R75W, AODE

Oversized Bypass Clutch Control Valve
Part No. 76948-31

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TCC codes, shuttle or loss of lockup can indicate a bypass control problem. A worn bypass clutch control bore or valve will lower converter and TCC apply pressure. The Sonnax oversized bypass clutch control valve and tool kit salvages affected valve bodies, allowing you to ream the bore to accept the oversized valve, restoring proper function to the bypass control circuit.

  • Salvages valve bodies with wear of the bypass clutch control bore or valve.
  • Corrects TCC codes, shuttle/loss of lockup, converter overheat and reduced/lost cooler flow.
  • Provides increased valve support for longer service life.

November 14, 2016

Ford 4R70E, 4R70W, 4R75E, 4R75W, AODE Vacuum Test Guide

Topics: Vacuum Test Guides Vacuum Testing Transmission Ford 4R75W Transmission 4R70W Transmission AODE Transmission 4R70E Transmission 4R75E Transmission

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  • 76948 31 combo
  • 76948 31