AT-78 AUTOMATIC TRANSMISSION — Component Parts (Overdrive Brake) Overdrive Brake COMPONENTS Disc 7M-GTE Snap Ring Flange Flange Plate Race O/D Support O/D Brake Piston Bearing Race Brush Drum Snap Ring Piston Return Thrust Washer Spring ◆ O-Ring Oil Seal Ring ◆ Non-reusable part AT064d DISASSEMBLY OF OVERDRIVE BRAKE 1. CHECK OVERDRIVE BRAKE PISTON MOVING (a) Place the O/D support assembly onto the direct clutch assembly. D4851 (b) Apply compressed air into the oil passage as shown, and be sure that the O/D brake piston moves smoothly. D4785