AT-45 A340E(Others) AUTOMATIC TRANSMISSION - OVERDRIVE DIRECT CLUTCH 3. CHECK PISTON STROKE OF OVERDRIVE DIRECT CLUTCH (a) Place the oil pump onto the torque converter clutch, and then place the O/D direct clutch assembly onto the oil pump. AT8140 (b) Using SST and a dial indicator, measure the O/D direct clutch piston stroke while applying and releasing compressed air (392-785 kPa, 4-8 kgf/cm2, 57-114 psi). SST 09350-30020 (09350-06120) Piston stroke: SUPRA: 1.45-1.70 mm (0.0571-0.0669 in.) OTHERS: 1.85-2.15 mm (0.0728-0.0846 in.) If the values are non-standard, inspect the discs. SST Vinyl Tape AT4448 4. REMOVE FLANGE, PLATES AND DISCS (a) Using a screwdriver, remove the snap ring from the O/D direct clutch drum. (b) Remove the flange, plates and discs. AT8131 5. REMOVE PISTON RETURN SPRING (a) Place SST on the spring retainer and compress the return spring with a shop press. SST 09350-30020 (09350-07040) (b) Using snap ring pliers, remove the snap ring. (c) Remove the piston return spring. SST AT8132 6. REMOVE OVERDRIVE DIRECT CLUTCH PISTON (a) Place the oil pump onto the torque converter clutch and then place the O/D direct clutch onto the oil pump. (b) Hold the O/D direct clutch piston with hand, apply compressed air to the oil pump to remove the O/D direct clutch piston. (c) Remove the O/D direct clutch piston. (d) Remove the 2 O-rings from the piston. AT3151