Overdrive Seals & Gaskets

This mini-rebuild kit contains parts to repair the most common internal failures of worn or cracked hydraulic seals (o-rings) and or broken pressure relief valve springs. Be sure to determine if you actually do have an internal problem before tearing into your overdrive as the most common reason an overdrive won’t operate is usually related to simple electrical problems. Removing the overdrive for inspection and installation of our mini kit is not too difficult for the experienced do-it-yourselfer. In most cases the overdrive can be separated from the transmission without removing the transmission from the car. If it goes smoothly, plan for the job to take about 6-8 hours. Our mini-rebuild kit includes 2 upgraded hydraulic pistons with seals (not the pump seal), early and late style pressure relief springs, overdrive to transmission spacer gasket, inspection plate gasket, rear output shaft seal, nylon seals for the top mounting bolts, o-ring seals, and general instructions with exploded view of overdrive. Our kits include: OD main case gasket, OD rear case gasket, OD adapter gasket, OD sump gasket, 2 OD white rolled seals, OD dashpot valve body seal, 2 OD solenoid external seals, OD pump body seal, OD dashpot body seal, 2 pump plugs, OD dashpot sleeve seal, OD dashpot plug seal, OD speedometer housing seal, OD dashpot piston seal, 2 J-type piston seals, J-type output shaft seal, J-type valve spring (1 each for early and late models), and instructions.