Symptoms:

  • TCC codes
  • TCC slip
  • No lockup
  • TCC cycling
  • Overheated fluid
  • Low cooler & lube pressure
  • Loss of fuel economy

Cause:

Excess wear of TCC apply boost valve and sleeve allows critical pressure loss, resulting in TCC apply and release concerns.

Correction:

Recover hydraulic control and renew TCC performance by installing Sonnax drop-in TCC apply boost valve kit.
  • 6R140 TCC Apply Boost Valve Kit 126740-03K
  • 6R140 TCC Apply Boost Valve Kit 126740-03K

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.

6R140 TCC Apply Boost Valve Kit Vacuum Test Locations