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. Sonnax pressure regulator sleeve kit 37947-05K mates with the OE anodized aluminum valve or optional Sonnax pressure regulator valve 37947-54. Use of this sleeve allows the valve bore to be oversized, and the hydraulic integrity of the bore to be restored.

• 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 Sonnax TCC modulator sleeve kit 37947-07K