Boost Valve Kit

Boost Valve Kit Valve Sleeve Medium Ratio, OE code 448 Symptoms: Burnt clutches Delayed Reverse Low line pressure Soft upshifts Cause: Leakage between the boost valve and sleeve. Correction: Sonnax boost valve and sleeve kits are available in three different ratios to restore pressure control in most OE applications. Boost ratio: Medium Large spool Diameter .662 Small spool Diameter 0.630 NOTE: Medium boost ratio kit. Please see chart to verify.