AT-40 A340F AUTOMATIC TRANSMISSION - SERVICE SPECIFICATIONS Forward Clutch Pack clearance 0.4 - 0.8 mm 0.016 - 0.031 in. Drum bushing inside diameter 24.08 mm 0.9480 in. Flange thickness No.61 3.0 mm 0.118 in. No.60 3.2 mm 0.126 in. No.45 3.4 mm 0.134 in. No.62 3.6 mm 0.142 in. No.44 3.8 mm 0.150 in. No.42 4.0 mm 0.157 in. No.63 4.2 mm 0.165 in. No.64 4.4 mm 0.173 in. Second Coast Brake Piston stroke 1.5 - 3.0 mm 0.059 - 0.118 in. Piston rod length 72.9 mm 2.870 in. 71.4 mm 2.811 in. Front Planetary Gear Maximum inside diameter 24.08 mm 0.9480 in. Planetary pinion gear thrust clearance Standard 0.20 - 0.60 mm 0.0079 - 0.0236 in. Maximum 1.00 mm 0.0394 in. Planetary Sun Gear Sun gear bushing inside diameter Maximum 27.08 mm 1.0661 in. Second Brake Pack clearance 0.50 - 1.76 mm 0.0197 - 0.0693 in. First and Reverse Brake Pack clearance 0.50 - 1.02 mm 0.0197 - 0.0402 in. Flange thickness No.50 5.0 mm 0.197 in. No.51 4.8 mm 0.189 in. No.52 4.6 mm 0.181 in. No.53 4.4 mm 0.173 in. No.54 4.2 mm 0.165 in. No.55 4.0 mm 0.157 in. Rear Planetary Gear Planetary pinion gear thrust clearance Standard 0.20 - 0.60 mm 0.0079 - 0.0236 in. Maximum 1.00 mm 0.0394 in.