Pressure Regulator Sleevekit 4R44E,5R55E

Pressure Regulator Sleevekit 4R44E,5R55E Sleeve Retaining Clip Solenoid Regulator Valve Spring Constant oscillation of the pressure regulator valve can cause excessive wear at the balance line end of the bore, allowing balance line pressure to exhaust and preventing the pressure regulator valve from stroking to the lower line pressure position. Severe wear prevents line from entering the converter apply circuit, which will also restrict valuable cooler flow. Specially toleranced alloy aluminum sleeve is significantly more wear-resistant than the cast -aluminum valve body, and provides more contact surface with the valve for increased stability and durability. Kit includes a replacement solenoid regulator valve spring, which is often damaged during valve body disassembly. The tool kit 37947-TL5 also works for the 37947-07K TCC Modulator Sleeve Kit. Symptoms: Delayed engagement High line pressure Low cooler flow at idle Low line pressure Overheating Cause: Wear at the inboard end of the PR valve reduces force, which affects converter feed and engagements, also creating higher line pressure. Wear at the mid-outer end reduces line pressure as it leaks to sump. Correction: The Sonnax kits contain a highly wear resistant aluminum sleeve to fit with the OE anodized aluminum valve, providing additional support and proper line pressure control. Required tool: 37947-TL5