Aisin Warner 55-50 Pressure Regulator Boost Valve & Sleeve
Transtar Part Number: S89741F
Transtar now carries the Pressure Regulator Boost Valve & Sleeve for the Aisin Warner 55-50 transmission. This item from Sonnax Industries, Inc. (59947-07K) is an upgraded aftermarket item that addresses the common occurrences of delayed engagement, harsh/soft upshifts, and erratic reverse pressure due to wear. This drop-in replacement product features upgraded materials and tight tolerances to help prevent a reoccurrence of the original problems.