Product Details

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Vehicles with an AOD transmission frequently have problems with poor line rise which results in direct clutch failures and soft shift slides. These complaints are often caused by severe wear of the pressure regulator boost sleeve, allowing oil leakage. The hardened steel boost valve continuously reciprocates within the aluminum boost sleeve, and wears the inside diameter of the sleeve. This excessive leakage can be eliminated by installing the. Sonnax pressure regulator boost valve and o-ringed sleeve kit 76990K . The replacement boost sleeve has been manufactured out of a special aluminum designed to prevent wear. The O-rings added to the outside diameter of the sleeve prevent feed oil from escaping past the valve body bore. The steel valve has been tightly toleranced to allow minimum clearance with the inside diameter of the sleeve, thus restoring the hydraulic integrity of the assembly.