F RAMES SPRINGS BUMPER 1 T 3 V 7 503 SPRING ASSEMBLY Rear r T TV T I T T LEAF TYPE V 1 NOTE 1 On 604934 spring rate can be increased from 1530 Ib per in to 1800 lb per in by addition of No 2 leaf 3657428 T J NOTE 2 May be used together w aux spring 3720588 on T1 Ton models w hvy duty automatic or 4 Spd 1 transmissions 1 V V 80 68 Ser 30 exc D D H D Aux T 1 Sprg 11 000 lb axle V 488 Ser 20 D D 1 t 13783005 2 8 leaves T r 60 81 Ser 30 w H D 1st design T 1 1 exc D D V T T I 80 88 Ser 30 D 0 w Dual Rear I T T Wheels V T 3894269 2 12 leaves 2 stage 81 88 Ser 30 w 1 I D 2nd design V T V T 1 exc D D I 88 Ser 20 30 D D exc 1 1 000 V lb axle V 1 1 1 88 Ser 20 w 133 W B H D exc I T I V D 0 3796040 2 8 leaves 2 stage 83 88 Ser 30 exc D D T T T T V1 68 Ser 30 0 D 3794401 2 1 5 leaves auxiliary spring 1 85 87 Ser 10 20 3907210 2 1 1 7 leaves I 87 70 G 10 axc H D 3687732 2 2 leaves 87 88 Ser 10 20 4 WD exc H D 3888908 2 T V 2 leaves T T 87 72 Ser 10 20 exc D D 4 WD 3888911 2 1 leaf auxiliary 87 88 Ser 20 4 WD w H D Y T 3888959 2 3 leaves T 88 Ser 10 Cab w H D Leaf 4 Spring 3931248 2 9 leaves 89 Ser 20 133 W B w H D aux T spring T 1 89 Ser 30 exc 11 000 lb Sgl I T 1 V Spd axle 1 I O O 89 Ser 20 4 WD D D I 70 Ser 20 Conv 133 W B T w aux spring V 70 Ser 30 w aux spring T 1 1T 71 72 Ser 20 D D w aux spring V H D tr spring I V 71 72 Ser 20 30 Conv 4 WD 1 T TT I w aux spring H D rr spring 1 T V 1 71 72 Ser 30 D D exc M H C 1 T V 71 72 M H C exc H D 3977567 2 6 leaves 8 V V 69 Ser 10 w rr leaf spring exc T 1 I 1 T T H D T T T 1 71 72 Ser 10 Conv Cab exc H D 1 1 TT T T rr spring 3938592 2 4 leaves I 69 70 Ser 10 w rr spring H D exc I T 1 T T 89 70 Ser 20 w rr spring exc l l D T 1 V T 71 72 Ser 10 Conv Cab w H D rr V spring I o i V 71 72 Ser 20 Conv Cab w 127 V T W B exc H D rr spring 1 3941831 2 T 5 leaves i T 69 70 Ser 20 Cab 127 W B w rr 1 spring H D V T 1 71 72 Ser 20 Conv Cab 127 W B w H D rr spring 3941642 2 6 leaves 89 70 Ser 20 w 127 W B exc H D T 1 aux spring 4 WD 1 I 89 70 Ser 30 exc D D H D aux V 1 spring 89 Ser 20 D D exc H D T V 71 72 Ser 20 Conv w 133 W B 1 A exc H D rr spring aux T 1 spdngy 1 T I 71 72 Ser 30 exc Pick Up 1 1 000 T V lb Single Speed Axle 71 72 Ser 20 0 D exc H D rr T I V spring V 3941753 2 5 leaves 69 Ser 30 vv 1 1 000 Ib Sgl Spd T axle 3955572 2 7 leaves two stage 89 Ser 30 w 11 OOO lb Sgl Spd I axle 3955573 2 5 leaves auxiliary GM PARTS DIVISION GENERAL MOTORS CORPORATION CH EVl lOl ET 472TLL 7 503 7 503 T 7 20 T T V V T REV 5 79 I