Sonnax 84754-43K 4T65E Transmission TCC Apply Valve Kit with Seal

Brand: SonnaxInterchange Part Number: S84741GC-1Manufacturer Warranty: YesFitment Type: Direct ReplacementItems Included: Valve, PTFE Seals (2) 1 extra, Spring, O-RingManufacturer Part Number: 84754-43KMaterial: AluminumUniversal Fitment: YesVintage Part: NoPerformance Part: Yes 4T65-E Transmission TCC Apply Valve KitPart No. 84754-43K 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. Hardcoat anodized aluminum valve with an expandable PTFE seal on the TCC signal valve spool provides a positive seal