AT-28 A340E(Others) AUTOMATIC TRANSMISSION - SERVICE SPECIFICATIONS Direct Clutch Piston stroke 1.37 - 1.60 mm 0.0359 - 0.0630 in. Drum bushing inside diameter 53.99 mm 2.1256 in. Flange thickness No.33 3.0 mm 0.118 in. No.32 3.1 mm 0.122 in. No.31 3.2 mm 0.126 in. No.30 3.3 mm 0.130 in. No.29 3.4 mm 0.134 in. No.28 3.5 mm 0.138 in. No.27 3.6 mm 0.142 in. No.34 3.7 mm 0.146 in. Forward Clutch Pack clearance 0.5 - 0.9 mm 0.020 - 0.035 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 0.62 - 1.98 mm 0.0244 - 0.0780 in.