AT-1 12 A340E(Others) AUTOMATIC TRANSMISSION - COMPONENT PARTS INSTALLATION Front Race AT5138 AT5431 Z05136 (b) Coat the race with petroleum jelly and install it onto the front planetary ring gear. Race diameter mm (in.) Inside Outside Race 26.8 (1.055) 47.0 (1.850) AT5432 (c) Align the flukes of the discs in the forward clutch. Front Planetary Ring Gear Forward Clutch Q00838 (d) Align the splines of the front planetary ring gear with the flukes of the discs and install the front planetary ring gear to the forward clutch.