37. REMOVE BRAKE DRUM GASKET Using a screwdriver, remove the gasket. 38. CHECK FIRST AND REVERSE BRAKE PISTONS MOVING Make sure the first and reverse brake pistons move smooth-ly when applying and releasing the compressed air into the transmission case. 39. REMOVE COMPONENTS OF FIRST AND REVERSE BRAKE PISTON (a) Set SST on the spring retainer, and compress the return spring. SST 09350-30020 (09350-07050) (b) Remove the snap ring with snap ring pliers. (c) Remove the piston return spring. (d) Hold No. 2 first and reverse brake piston with hand, apply compressed air to transmission case to remove No. 2 first and reverse brake piston. (e) Remove No. 2 first and reverse brake piston. If the piston does not pop out with compressed air, lift the piston out with needle-nose pliers. (f) Remove the O-ring from No. 2 piston. (g) Insert SST behind the reaction sleeve and gradually lift it out of the transmission case. SST 09350-30020 (09350-07080) (h) Remove the O-ring from the reaction sleeve.