Symptoms:

  • TCC apply concerns
  • Overheated converter
  • Loss of lube oil

Cause:

The OE plastic solenoid snout cracks where it contacts the plunger valve causing oil leaks, while the PWM TCC signal drainback valve becomes loose or melts and blocks the converter apply valve.

Correction:

Replace the broken solenoid snout with an aluminum snout either with or without a built-in anti-drainback valve.

4L60-E, 4L65-E, 4L70-E

TCC Solenoid Snout Kit
Part No. 77942-02K

Fits '97-later PWM units, Built-in anti-drainback valve

View Instructions Find a Distributor

The plastic OE torque converter clutch solenoid snouts are prone to breakage causing them to leak oil that should be directed to the converter clutch apply valve. Until now, your only option was to replace the entire OE harness or purchase an aftermarket solenoid and splice it into the existing harness. Sonnax TCC solenoid snout kit 77942-02K that eliminates the need for the damage-prone plastic OE drainback valve in for GM 4L60-E, 4L65-E and 4L70-E '97-later PWM units. Sonnax also offers TCC solenoid snout kit 77942-01K that allows the OE solenoid in '96-earlier GM 4L60 and 4L60-E units to be rebuilt to better-than-new condition.

  • Anti-drainback TCC solenoid snout eliminates the need for the damage-prone plastic OE drainback valve, eliminating the possibility of burned converters and loss of lube
  • TCC Solenoid Snout with Anti-Drainback Valve
  • O-Ring
  • 4L60-E, 4L65-E, 4L70-E TCC Solenoid Snout Kit 77942-02K