55 62 172 Ton V 55 56 Ser 6 3753730 4 2 80 I6 11 X 2 V 4 l Sld dlm 56 Ser 9 10 exc TDM SBC 1st design 56 59 Ser 9 10 w H D shock A absorb exc TDM SBC 3753734 4 3 80 16 17Vz x 8 inside dim 56 57 SBC 3753736 4 3 10 3 4 l6 13 x 3V inside dim 57 D D 3753742 4 1 80 18 8 x 2 inside dim 56 59 Ser 7 8 exc SBC TDM 56 57 Ser 9 10 2nd design exc TDM SBC 56 59 Ser 10F w shock absorber 3753735 4 3 40 16 3 x 13 inside dim 60 66 All 67 70 Ser 50 60 3891372 A R 3 10 1l5 16V x 3 2 inside dim 64 66 Ser 80 w 23 000 Ib axle exc TDM 65 66 Ser 60 4 cyc Diesel w 18400 Ib 22 000 lb springs exc TDM 70 Ser 60 Tilt aux 20 800 Ib rear spring w 18 500 Ib axle 675971 A R 1Ei 16 inside t0 end 65 66 Ser 60 4 cyc Diesel exc 16 000 lb axle TDM 2416111 2 4 55 2 s l D x 4 4 O D 7 529 63 70 Ser 50 60 exc H D Springs 3831136 4 3 10 16 14V4 x 2 S4 inside dim 68 70 Ser 60 w 23 000 lb rear axle exc aux spring 3928173 4 3 00 1l5 17 x 3 z l D 68 69 Ser 60 aux spring w 23 000 lb rr axle 3928174 4 3 40 1ll5 19 x 3 2 l D 68 70 Ser 50 w aux spring 17 500 lb axle 3932089 4 3 00 I5 14 S x 2 z l D 38 48 1Vz Ton 55 Ser 5 56 59 Ser 5 7 8 9 10 63 66 Ser 60 80 exc Tilt 63 66 Ser 60 Tilt exc 9 000 11 000 Ib axle 67 68 Ser 50 60 exc TDM 373912A R 20 NUT attach 18 5 813 60 67 All 69 70 Ser 40 thru 60 exc TDM 3765653 8 20 NUT 16 70 Ser 50 60 Tilt 671131 8 69 NUT 10 54 55 Utility 1st Ser 55 59 Ser 4 5 6 7 8 10F TDM 3768886 8 10 WASHER D x IV4 O D x thk 65 Ser 80 w 23 000 Ib rear axle 66 Ser 80 w 23 000 lb rear axle exc TDM 68 Ser 60 Cab w 23 000 lb axle 2394208 8 20 WASHER 7 417 7 518 SHIM PIN PLATE SPACER Rear Spring U Bolt See Group 5 403 Shim Chart 1971 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATION P A 31S REV 6 71 1 49 7 516 7 518