ALLISON A T 540 GEAR UNIT AND OUTPUT SHAFT y 1 4 175 GEAR UNIT AND OUTPUT SHAFT ASSY 25 N S S CARRIER Center Planetary 2 4 161 SHAFT ASSY Sun Gear 26 N S S WASHER Pinion Thrust 3 4 161 BUSHING 27 N S S PINION Center Planetary 4 N S S SHAFT Sun Gear 28 N S S BEARING Needle Roller 5 4 172 SHAFT Transmission Main 29 N S S PIN Planetary Pinion 6 4 158 WASHER Thrust Front Sun Gear to 30 4 169 WASHER Thrust Center Sun Gear to Rear Center Support Sun Gear 7 4 189 GEAR Front Sun 31 4 169 DRUM Rear Carrier 8 4 176 WASHER Thrust Front Sun Gear to Front 32 4 172 RING External Snap Carrier Selective I D No 1 064 068 33 4 172 GEAR Center Internal Inch Thk 34 4 159 GEAR Rear Sun 8 4 176 WASHER Thrust Front Sun Gear to Front 35 4 176 BEARING Needle Carrier Selective LD No 2 083 087 36 4 159 RACE Thrust Sun Gear to Output Shaft Inch Thk 37 4 179 RING External Spiral Retaining 8 4 176 WASHER Thrust Front Sun Gear to Front 38 4 179 RING External Retaining Carrier Selective l D No 3 102 106 39 4 192 CARRIER ASSY Rear Planetary Inch Thk 40 N S S CARRIER Rear Planetary 9 4 192 CARRIER ASSY Front Planetary 41 N S S WASHER Pinion Thrust 10 N S S PIN Front Planetary Pinion 42 N S S PINION Center and Rear Planetary 11 N S S FLANGE AND CARRIER ASSY Front Planetary 43 N S S ROLLER Bearing Needle A 12 N S S FLANGE Front Planetary Carrier 44 N S S PIN Planetary Pinion 13 N S S CARRIER AND BUSHING ASSY Front 45 4 164 RING Internal Snap V 14 N S S CARRIE R Front 46 4 176 WASHER Spacer 15 14 162 BUSHING Front Planetary Carrier 4 7 4 175 GEAR Rear Internal 16 N S S PIN Carrier Rivet 48 4 176 WASHER Spacer 17 N S S WASHER Pinion Thrust 49 4 179 RING External Spiral Retaining 18 N S S PINION Front Planetary 50 4 176 BEARING Ball 19 N S S BEARING Needle 51 4 175 SHAFT ASSY Output 20 4 176 WASHER Thrust Front Carrier to Center 52 N S S SHAFT AND BUSHING ASSY Output Carrier 53 4 176 BUSHING Mainshaft Pilot 21 4 164 RING Internal Snap 54 N S S SHAFT Output 22 4 159 GEAR Front Internal 55 l S S PLUG 34 Dia 23 4 159 GEAR Center Sun 56 8 939 PIN Spring Governor Drive Gear 24 4 175 CARRIER ASSY Center PI anetary Serviced As An Aesy Not Serviced Separately TP4 81 GM PARTS DIVISION GENERAL MOTORS CORPOR TlON CHEVROLET 72TM 4 35 P 4 000 GROUP