AUTOMATIC TRANSMISSION — Component Parts (Overdrive Brake) AT-79 2. REMOVE CLUTCH DRUM THRUST WASHER FROM OVER-DRIVE SUPPORT D4810 3. REMOVE PISTON RETURN SPRING (a) Place SST on the spring retainer, and compress the return spring with a shop press. SST 09350-30020 (09350-07030) (b) Remove the snap ring with a screwdriver. (c) Remove the piston return spring. SST D4811 4. REMOVE OVERDRIVE BRAKE PISTON (a) Place the O/D support onto the direct clutch assembly. D5143 (b) Hold the O/D brake piston so it does not slant and ap-ply compressed air into the passage to remove the O/D brake piston. (c) Remove the O/D brake piston. (d) Remove the two O rings from the piston. D4812 5. REMOVE OIL SEAL RINGS D4813