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Non-Domestic Product: No

Other Part Number: 5006979 84885M

Custom Bundle: No

Fitment Type: Direct Replacement

Items Included: Oversized Valve with O-ring

Manufacturer Part Number: HV093

Drive Type: AWD,FWD

Material: Aluminum

Modified Item: No

Brand: Sonnax

Type: Valve body repair

Interchange Part Number: S84741CGK

Manufacturer Warranty: Unspecified Length

4T65E Transmission Valve Body Repair

Oversized TCC Apply Valve Kit
Part No. 84754-50K

REAMING TOOLING REQUIRED

In GM 4T65-E units, continuous oscillation of the converter apply valve in the cast-aluminum bore causes bore wear, particularly at the TCC signal valve spool closest to the solenoid. Wear in this area allows TCC signal oil to leak, which inhibits the valve from stroking to the lockup position. Due to the valve body casting design and oil flow, this valve is also subject to extreme side loading, which increases the wear rate. Early OE versions of this valve were made from non-anodized aluminum, and show significant wear marks. Reconditioning the bore and installing Sonnax oversized TCC apply valve kit 84754-50K provides a positive seal and ensures proper valve stroke.

  • Hardocat anodized aluminum valve combats premature wear
  • Annular grooves help keep valve centered and improve performance and prevents side loading
  • Re-use the OE spring
  • A replacement O-ring has been included for the OE end plug, to be used after inspecting the TCC regulated apply valve
Note Always inspect the TCC regulated apply valve for wear. The O-ring in this kit should be used to replace the original end plug O-ring after inspection. Worn valves or bores can be repaired using the Sonnax TCC regulated apply valve and sleeve kit 84754-34K

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