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  • Overheated fluid
  • RPM surge on coast
  • Harsh downshifts
  • TCC apply & release concerns
  • TCC codes
  • Poor fuel economy


Bore wear at the TCC apply valve allows critical pressure loss that prevents proper TCC operation.


Recover hydraulic control and restore normal TCC action by reconditioning the bore and installing Sonnax oversized TCC apply valve.


Oversized TCC Apply Valve
Part No. 85755-08

Also fits VW/Audi 01V applications.

You need this if... View Instructions

Vehicles equipped with ZF5HP19 transmissions often encounter TCC troubles such as RPM surge, overheating, apply and release concerns and TCC codes. These problems can often be traced to excess bore wear at the TCC apply valve, which permits crucial control pressure to exhaust. Reconditioning the bore and installing Sonnax oversized TCC apply valve 85755-08 shores up the hydraulic integrity of the circuit for renewed TCC operation and control.

  • Hardcoat anodized aluminum valve combats premature wear

OE valve spool diameters MUST match dimensions noted in the illustration. This kit cannot be used in bores with any other size OE valve.

  • 85755 08 combo
  • 85755 08
  • 85755 08 details

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.

  • 85755 08 test