65 66 Ser 60 4 cyc Diesel 16 000 lb axle w Air Equip 2370731 1 730 00 Timken B31 3800 X 518 6 61 9 90 to 1 ratio 65 Ser 80 TDM 4 cyc A Diesel 2487421 1 1738 00 frt rr 65 Ser 80 TDM 4 cyc Diesel w 34 000 Ib axle Air Brake 2487420 1 1738 00 front rear Eaton 64755 7 80 to 1 ratio 65 66 Ser 60 4 cyc Diesel w 17 000 Ib 2 Spd axle 8879259 1 720 00 6 14 B 54 to 1 ratio Eaton 69066 65 66 Ser 80 2 cyc Diesel 23 000 lb 2 Spd axle w electric shift exc TDM 677573 1 1405 00 4 87 6 63 ratio Eaton 60436 Note 1 65 66 Ser 60 4 cyc Diesel w 17 000 Ib axle exc Z pd 8879272 1 514 00 6 14 to 1 ratio Eaton 16121 65 66 Ser 60 4 cyc Diesel w 17 000 Ib 2 Spd axle 8879258 1 720 00 5 57 7 75 to 1 ratio 65 70 All w 13 500 lb axle 68 69 Ser 40 w Dual Brakes 3879524 1 307 40 6 401 0 1 ratio 65 67 All w 13 500 lb axle 3879525 1 307 40 5 291 0 1 ratio 65 Ser 80 4 cyc Diesel w 18 500 lb 2 Spd axle exc TDM 2454272 1 965 00 6 14 8 38 ratio Eaton 61836 66 Ser 60 80 Tilt TDM 2 cyc Diesel w 18 500 Ib axle 67 Ser 60 w 18 500 Ib Sgl Spd axle 4 cyc Diesel 8870219 1 640 00 4 88 8 39 ratio Eaton 68931 less yoke Note 2 65 66 Ser 50 60 w 15 000 Ib axle exc 2 Spd 3879533 1 372 05 5 83 to 1 ratio 66 Ser 60 4 cyc Diesel w 17 000 lb 2 Spd axle 8879257 1 720 00 4 88 6 78 to 1 ratio 2 66 Ser 60 4 cyc Diesel w 15 000 Ib 2 Spd axle exc Air Equip 2488476 1 580 00 5 29 7 20 to 1 ratio 66 Ser 60 4 cyc Diesel w 15 000 Ib 2 Spd axle exc Air Equip 2488477 1 580 00 5 83 7 95 to 1 ratio 66 Ser 50 60 w 15 17 000 lb 2 Spd axle exc Diesel 66 Ser 60 TDM w 28 000 Ib 2 Spd axle exc Diesel 66 Ser 50 60 4 cyc Diesel w 2 Spd axle exc TDM 67 70 Ser 50 w 15 28 000 Ib 2 Spd axle exc Diesel 68 69 Ser 50 w Dual Brakes exc TDM Diesel 3982244 1 614 80 6 50 8 85 ratio 66 Ser 80 Diesel w 23 000 lb 2 Spd axle 612223 1 1405 00 4 87 6 63 ratio Eaton 75747 66 All w 11 000 lb axle 67 Ser 40 Tilt Diesel exc 13 500 lb axle 67 69 Ser 60 w 18 500 lb Sgl Spd axle 65 Ser 60 TDM Diesel w 2 Spd 3880664 1 296 80 5 43 to 1 ratio 66 Ser 80 w 18 500 lb 2 Spd axle 2nd design exc TDM Diesel 6 50 18 87 to 1 ratio less yoke 67 70 Ser 60 w 18 500 lb 2 Spd axle 648123 1 965 00 Eaton 78497 Note 2 66 Ser 80 w 18 500 lb 2 Spd axle 2nd design exc TDM Diesel 7 17 9 77 to 1 ratio less yoke 67 70 Ser w 18 500 Ib 2 Spd axle 64 8124 1 965 00 Eaton 78498 Note 2 T 1971 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATION P A 315 REV 6 71 5 197 5 505 5 505