Symptoms:

  • Coastdown clunk
  • Harsh TCC apply
  • Excess TCC slip
  • TCC codes & overheating
  • TCC lining failure
  • Low lube oil flow
  • Low TCC release pressure

Cause:

Bore wear at the TC pressure valve causes erratic pressure that leads to drivability concerns.

Correction:

Eliminate the wear that causes TCC problems by reconditioning the bore and installing Sonnax oversized TC pressure valve kit.

845RE, ZF8HP45, ZF8HP55, ZF8HP70

Oversized TC Pressure Valve Kit
Part No. 35740-18K

ZF valve name: WD-V
Chrysler valve name: TC-V


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

Vehicles equipped with Chrysler 845RE and ZF8HP45, ZF8HP55 and ZF8HP70 transmissions may have TCC problems such as harsh apply, excess slip, lining failure and related trouble codes. These issues are often the result of bore wear at the TC pressure valve, which allows critical control pressure to escape the circuit. Leakage here can also cause a 2-1 downshift clunk and diminished lube oil flow. Reconditioning the bore and installing Sonnax oversized TC pressure valve kit 35740-18K eliminates bore leakage for renewed TC and lube control.

  • Annular grooves help center valve in bore to reduce side-load wear
  • Hardcoat anodized aluminum valve combats premature wear
  • 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 Valve Body Layout

ZF8HP45, ZF8HP70 Valve Body Layout

ZF8HP45, ZF8HP70 Valve Body Layout
  • 845RE, ZF8HP45, ZF8HP55, ZF8HP70 Oversized TC Pressure Valve Kit 35740-18K

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.

845RE, ZF8HP45, ZF8HP55, ZF8HP70 Oversized TC Pressure Valve Kit Vacuum Test Locations