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Reconditioning the bore and installing Sonnax lockup clutch control valve kit 15741-29K eliminates bore wear for renewed TCC and drivability performance
Wear in the Reverse boost sleeve results in low line pressure
TCC lining degradation
Aluminum case halves are harder than original magnesium and come reinforced around the pump so no concerns with pump wear
Other Part Number: 68RFE-601A
Sonnax 84757-01K Torque Converter Clutch (TCC) Relief Valve Kit (10 per bag) Rebuild Kit Reconditioning the bore and installingManufacturer Part Number: 84757 01K Other Part Number: S84755A 1 Brand: Sonnax 4T65 E TCC Relief Valve Part No. 84757 01K Package Quantity: 10 GM 4T65 E transmissions often suffer converter failure during high line pressure conditions such as max adapts or various codes due to excess apply pressure. The torque converter piston is designed for operating pressures of 135 psi, but the OE apply pressure relief doesn't crack until 175 psi and can allow
