FRAME SPRINGS BUMPER 7 495 INSERT Spring Leaf 64 70 All w leaf spring 3935737 A R graphited polyethylene plastic 2 z x ia thk 7 503 SPRING ASSY Rear l NOTE 1 On 604934 spring rate can be increased from 1 530 lb per in to 1 800 Ib per in by addition of N0 2 leaf 3657428 55 59 Ser 4 SBC 3894269 2 12 leaves 2 stage 60 66 TDM 17 250 Ib exc H D 67 70 Ser 60 TDM exc 39 000 spring H D Sgl Spd axle f 69 Ser 50 TDM w 34 500 rr spring A 71 72 Ser 60 TDM exc 39 000 Ib rr spring 3773188 2 leaves 60 66 TDM w H D spring axle I 67 69 Ser 60 TDM w 39 000 lb spring H D Sgl Spd axle 3780640 2 12 leaves 60 66 Ser 60 thru 80 4 cyc Diesel V 67 Ser 50 60 w aux spring 68 Ser 60 w 23 000 Ib rear axle aux spring 69 70 Ser 50 60 Tilt aux springs w 17 000 Ib rear axle 71 72 Tilt w 17 000 Ib rr axle exc 18 500 rr axle 23 000 Ib rr axle 2453876 2 aux 4 leaf 3 60 62 All 9 200 lb exc Tilt TDM 66 All 65 Ser 80 4 cyc Diesel exc TDM 65 66 Ser 60 4 cyc Diesel w 17 000 Sgl Spd axle 70 Ser 50 60 Tilt 71 72 Tilt w 17 000 lb axle 2457442 2 9 leaves 63 65 Ser 60 w H D springs 63 66 Ser 50 exc 2 Spd H D rr spnngy 67 70 Ser 40 exc H D 13 500 rr axle 71 72 Ser 40 Conv SBC exc 15 000 17 000 lb rear spring 13 500 lb Sgl Spd rr axle 3818301 2 8 leaves 2 stage 63 66 Ser 50 60 w 17 000 Ib rear spring exc TDM 67 72 Ser 40 50 w 17 500 lb rear spring exc TDM 3818303 2 1 1 leaves 2 stage 63 66 Ser 60 w 17 000 Ib axle 63 65 Ser 80 exc TDM 67 70 Ser 60 exc TDM 18 500 20 800 23 000 Ib rr axle 69 72 Ser 50 Conv SBC w 17 000 Ib rr axles 71 72 Ser 60 Conv exc 20 800 23 000 lb rr spring 3818304 2 9 leaves 2 stage 63 Ser 60 80 w 10 400 Ib rear spring exc TDM 64 66 Ser 60 80 w 20 800 lb rr spring exc TDM 64 65 Tilt Diesel exc H D rr spg axle 66 Ser 60 2 cyc Diesel w 2 Spd 17 000 lb axle exc TDM 67 72 Ser 50 60 w 20 800 lb rr spring 67 70 Ser 60 Conv SBC w 2 Spd 18 500 Ib axle 71 72 Ser 60 Conv w 18 500 Ib rr axle exc 23 000 lb rr spring 3818305 2 10 leaves 2 stage 63 66 Ser 60 80 w 23 000 lb rear spring exc TDM 67 72 Ser 50 60 Conv SBC Tilt w 23 000 lb rr spring 71 72 Ser 60 Conv w 23 000 lb rr axle 3818306 2 1 1 leaves 2 stage GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TM REV 5 79 7 33 7 495 7 503 W 7 d 4 A g 5