Symptoms:

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

Cause:

Excess wear in TCC apply regulator bore and/or boost assembly allows critical pressure loss, resulting in TCC apply and release concerns.

Correction:

Recover hydraulic control and renew TCC performance by installing Sonnax TCC apply regulator and boost valve kit.

6R140

Oversized TCC Apply Regulator & Boost Valve Kit
Part No. 126740-15K


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

Ford 6R140 transmissions often display TCC-related concerns due to deterioration in the TCC apply regulator bore and boost assembly. As wear progresses, pressure loss causes various symptoms to arise such as TCC slip, no lockup, insufficient cooler or lube pressure, overheated fluid, suffering fuel economy and/or TCC codes. Restore normal TCC operation and revive cooler/lube flow by reconditioning the bore and installing Sonnax oversized TCC apply regulator and boost valve kit 126740-15K.

  • Hardcoat anodized aluminum valves combat premature wear
  • Sleeve manufactured from highly wear-resistant aluminum
  • Annular grooves help center valve in bore to reduce future side-load wear
  • TCC Apply Regulator Valve
  • Spring
  • Boost Valve
  • Boost Sleeve

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.

Ford 6R140 Valve Body Layout

Ford 6R140 Valve Body Layout
  • 6R140 Oversized TCC Apply Regulator & Boost Valve Kit 126740-15K
  • 6R140 Oversized TCC Apply Regulator & Boost Valve Kit 126740-15K

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 Oversized TCC Apply Regulator & Boost Valve Kit Vacuum Test Locations