65 66 Ser 60 4 cyc Diesel w 17 000 lb 2 Spd axle 2450434 1 190 00 6 14 8 54 to 1 ratio Eaton 50227 65 66 Ser 60 4 cyc Diesel w 16 000 lb axle exc 2 Spd 5781580 1 148 00 7 20 to 1 ratio 66 Ser 60 4 cyc Diesel w 17 000 Ib 2 Spd axle 2450435 1 190 00 7 17 9 97 to 1 ratio 3772705 37726996 66 Ser 60 TDM w 28 000 Ib 2 Spd 67 Ser 60 17 000 Ib axle w Dual Brakes Diesel 68 Ser 50 60 Diesel 68 69 Ser 50 4 cyc Diesel 15 000 Ib axle w Dual Brakes exc Tilt 70 Ser 50 4 cyc Diesel w 15 000 lb 2 Spd axle 3886300 1 197 60 w pinion hypoid drive 3873523 3873530 5 57 7 59 to 1 ratio 66 Ser 50 Tilt 4 cyc Diesel w 15 000 lb 2 Spd 5 83 7 94 to 1 ratio 66 Ser 60 4 cyc Diesel w 15 000 Ib 2 Spd axle 3886301 1 124 20 w pinion hypoid drive 3873524 3873531 66 Ser 50 2 cyc Diesel w 15 000 lb 2 Spd 5 29 7 20 to 1 ratio w pinion 66 Ser 60 4 cyc Diesel w 15 000 Ib 2 Spd axle 3886302 1 124 20 3873522 3873529 66 Ser 60 w 17 000 Ib 2 Spd axle 67 Ser 50 60 Gas w 15 000 17 000 lb 2 Spd axle exc SBC 68 69 Ser 50 60 Gas exc TDM SBC 70 Ser 50 60 2 Spd axle exc Diesel TDM SBC 3886303 1 124 85 w pinion hypoid drive 3873526 3873533 7 17 9 76 to 1 ratio 66 Ser 60 2 cyc Diesel w 2 Spd axles exc TDM 67 Ser 50 60 Diesel w 2 Spd 15 000 17 000 lb axle 68 69 Ser 50 60 2 cyc Diesel 70 Ser 50 2 cyc Diesel w 15 17 000 lb 2 Spd axle 3886304 1 159 85 w pinion hypoid drive 3783521 3873521 3873528 4 86 6 86 6 61 to 1 ratio 66 Ser 50 w 15 000 lb 2 Spd exc 4 cyc Diesel 66 Ser 50 Tilt 4 cyc Diesel w 15 000 Ib 2 Spd 66 Ser 60 TDM w 28 000 lb 2 Spd 66 Ser 60 w 2 Spd axles exc 2 cyc Diesel TDM 67 69 Ser 50 60 Gas w 2 Spd axle 6 50 8 85 ratio 70 Ser 50 w 2 Spd axle exc Diesel 70 Ser 60 w 2 Spd axle exc TDM 3886305 1 138 75 w pinion hypoid drive 3873525 3873532 6 50 8 85 to 1 ratio 66 Ser 80 w 18 500 Ib 2 Spd 1971 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATION P A 31S 5 529 5 529 5 222 REV 6 71