Symptoms:

  • Excess heat

Cause:

In early-design ('11-'16) valve bodies, the thermal element can often become stuck in the bypass position, resulting in an overheated transmission.

Correction:

Replace the thermal element lineup with this bypass plug and clip to eliminate hang-up issues.

Warning:

It is recommended that this kit only be utilized in warm climates, or with synthetic fluids when used to replace the OE thermal bypass element. If used in '17-later applications to replace a missing blocker plug, it must be used in conjunction with Sonnax converter limit valve kit 126740-25K. See instructions for details.

6R140

Bypass Blocker Valve Kit
Part No. 126740-26K

Fits '11–'16 units only. Eliminates the need for the OE thermal element and can be used with or without Sonnax converter limit valve kit 126740-25K.

View Instructions Find a Distributor

Sonnax bypass blocker valve kit 126740-26K for Ford 6R140 transmissions eliminates the faulty OE thermal element that often sticks and causes overheat issues. The drop-in Zip Valve™ installs quickly and easily.

Learn More About Zip Valve™ Drop-In Repairs
  • Valve
  • Retainer
  • 6R140 Bypass Blocker Valve Kit 126740-26K
  • 6R140 Bypass Blocker Valve Kit 126740-26K