• Lockup shudder
  • TCC cycling


Wear at the TCC control sleeve due to continuous plunger valve oscillation allows valuable oil leakage.


Sonnax drop-in TCC control plunger valve kit is tightly toleranced to restore hydraulic integrity for proper TCC control.


TCC Control Plunger Valve Kit
Part No. 36424-08K

Fits PWM units only.

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Ford 4R100 PWM units use a plunger valve assembly and coil spring to cushion the TCC control valve. That assembly uses regulated converter pressure as a variable hydraulic spring to control the rate of TCC apply. Continuous oscillation of the TCC control plunger valve wears the sleeve I.D., allowing regulated converter pressure leakage. This can result in premature or bumpy TCC apply and/or shudder. Sonnax TCC control plunger valve kit 36424-08K restores hydrualic integrity.

  • Sleeve is manufactured from highly wear-resistant aluminum alloy
  • Hardcoat anodized aluminum valve combats premature wear
  • Drop-in Zip Valve parts install quickly and easily
Learn More About Zip Valve™ Drop-In Repairs

Use of the Sonnax kit does not convert hydraulics to On-Off for use with single piston conversion. The PWM control is a function of the computer and TCC/PWM solenoid.

  • Valve
  • Sleeve
  • 4R100 TCC Control Plunger Valve Kit 36424-08K
  • 4R100 TCC Control Plunger Valve Kit 36424-08K