Symptoms:

  • TCC slip
  • Code P0741
  • Cycling TCC RPM

Cause:

Bore wear at the TCC apply valve allows regulated apply oil to exhaust.

Correction:

Sonnax design improvements aid durability and restore apply pressure to eliminate converter clutch slippage.

4T65-E

TCC Regulated Apply Valve Kit
Part No. 84754-34K


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The OE TCC regulated apply bore in GM 4T65-E units wears, causing TCC signal (PWM) oil and TCC regulated apply oil to leak. The leakage lowers the apply pressure, which causes the torque converter clutch to slip. Sonnax TCC regulated apply valve kit 84754-34K addresses TCC slip, code 741 and occasional ratio codes.

  • Hardcoat anodized valve combats premature wear
  • Valve has annular grooves to prevent side loading
  • Wear-resistant sleeve is much more durable than the valve body casting and provides additional valve support

It is recommended to check separator plate orifices for contamination. Additionally, the TCC apply valve bore should be examined for wear with any TCC related concerns.

  • Valve
  • Sleeve
  • Spring
  • O-Ring

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.

GM 4T65-E Valve Body Layout

GM 4T65-E Valve Body Layout
  • 4T65-E TCC Regulated Apply Valve Kit 84754-34K
  • 4T65-E TCC Regulated Apply Valve Kit 84754-34K

You need this if...

4T65-E TCC Regulated Apply Valve Kit Vacuum Test Locations