Should be two gaskets and a seal in the clam shell assembly that houses the U joint and attaches the torque tube to the back of the transmission. A paper gasket between the clam shell halves and the inner bell, and another of the same paper gasket between the inner bell, and the rear transmission mount, plus a seal of cork, fabric, O ring, or rubber tubing in the groove of the clam shell halves that rides against the belled end of the torque tube. Pictures attached of two types of gasket kits.....