Bore wear in the B1/B2 apply control plunger valve sleeve in AS66RC and AS69RC transmissions allow line pressure to leak to exhaust at the B1 apply valve bore or line pressure and Reverse pressure to cross leak at the B2 apply valve bore. The result is inappropriate to apply pressure at the B1 and B2 clutches. Sonnax B1/B2 apply control plunger valve kit 122740-01K restores hydraulic control due to wear at either the B1 or B2 apply control plunger sleeve location, restoring proper clutch control to eliminate drivability issues and clutch distress.