AT-54 A340E(Others) AUTOMATIC TRANSMISSION - OVERDRIVE BRAKE (b) Apply compressed air into the oil passage as shown, and be sure that the O/D brake piston moves smoothly. AT8149 2. REMOVE CLUTCH DRUM THRUST WASHER FROM OVERDRIVE SUPPORT AT8158 3. REMOVE PISTON RETURN SPRING (a) Place SST on the spring retainer, and compress the re-turn 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 AT8444 4. REMOVE OVERDRIVE BRAKE PISTON (a) Place the O/D support onto the direct clutch assembly. AT8249 (b) Hold the O/D brake piston so it does not slant, and apply compressed air into the passage to remove the O/D brake piston. (c) Remove the O/D brake piston. (d) Remove the 2 O-rings from the piston. AT8159