• Converter shudder & TCC slip
  • Damaged TCC linings
  • TCC codes
  • Overheated converter
  • Poor fuel economy


Bore wear at the torque converter clutch valve allows crucial oil loss, resulting in TCC apply issues.


Recover hydraulic control and renew TCC operation by reconditioning the bore and installing Sonnax oversized torque converter clutch valve kit.

845RE, ZF8HP45, ZF8HP55, ZF8HP70

Oversized TCC Valve Kit
Part No. 35740-13K

ZF valve name: WK-V
Chrysler valve name: TCC-V

You need this if... View Instructions Find a Distributor

Vehicles equipped with Chrysler 845RE and ZF8HP45, ZF8HP55 and ZF8HP70 transmissions may experience converter shudder, TCC slip, overheating and/or damaged TCC linings, and may set various TCC-related trouble codes. These problems can be caused by wear in the torque converter clutch bore, which allows critical control fluid to escape the circuit. Reconditioning the bore and installing Sonnax oversized TCC valve kit 35740-13K prevents pressure loss and restores TCC operation by eliminating excess wear.

  • Hardcoat anodized aluminum valve combats premature wear
  • Annular grooves help center valve in bore to prevent side-load wear
  • O-Ringed end plug provides positive bore seal
  • Valve
  • End Plug
  • O-Rings (2) 1 Extra

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.

ZF8HP55 Valve Body Layout

Zf8hp55 vbl thumb

ZF8HP45, ZF8HP70 Valve Body Layout

Zf8hp45 70 vbl thumb

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  • 35740 13k

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.

  • 35740 13k in test