57 PASS w HD exc STA WAG 57 CONV NOMAD SDL TAXI 5 leaves 3733993 2 22 00 57 PASS w H D 57 STA WAG exc 9 PASS NOMAD 5 leaves 4 3734002 2 22 00 57 59 CORVETTE wyH D Brake Susp 5 leaves 3748143 2 40 60 53 59 CORVETTE exc HD Brake Susp 60 62 CORVETTE 4 leaves yellow paint 3751438 2 26 80 60 63 4 WD 10 leaves 2385697 2 26 25 60 63 Ser 30 exc D D H D 8 leaves 3763005 2 43 80 60 61 Ser 30 w HD lst design exc D D 61 62 Ser 30 w Spec H D exc D D 10 leaves 2 stage 3763006 2 54 95 61 63 Ser 30 w H D 2nd design exc D D 8 leaves 2 stage 3796040 2 43 80 63 CORVETTE exc special performance 3 leaves 3794095 1 33 45 63 CORVETTE w special performance 3 leaves 3828811 1 38 50 63 Ser 30 exc D D 5 leaves auxiliary spring 3794401 2 21 50 63 Ser 10 20 exc D D 4 WD 3 leaves auxiliary spring 3823083 2 15 30 XNOTE On 604934 spring rate can be increased from 1530 lb per in to 1800 lb per in by addition of No 2 leaf 3657428 NOTE May be used together w aux spring 3720588 on 1 TON models w hvy duty automatic or 4 SPD transmissions SPRING ASSEMBLY Rear Not Serviced NOTE The following rear spring assemblies are not serviced and are shown only for leaf model usage 40 47 SED CPE PlCK UP 40 48 T SED CPES CONV w 18 in wheels HD w 16 in wheels 48 4 DR SED AEROSEDAN 49 53 4 DR PASS w H D exc STA WAG 8 leaves 605383 use 3657464 40 48 CPE CONV exc CPE P1CK UP 48 TOVVN SEDAN 49 52 PASS exc BUS CPE SDL STA WAG 7 leaves w cover 605374 use 3657967 41 48 STA VVAG Reg Prod 49 53 SDL STA WAG w H D 8 leaves 605632 use 3711514 41 48 SBC 11 leaves 2 stage spring 3656733 use 3690849 46 48 DS ES FS CAB CAB w PLATFORM 11 leaves H D 3689276 use 3689128 46 48 DS ES FS CAB CAB w PLATFORM 12 leaves 3682298 use 3689128 47 48 UTIL exc SBC ll leaves 3686487 use 3690893 49 53 BUS CPE 7 leaves 3692293 use 3707591 49 53 BUS CPE 7 leaves 3697914 use 3707591 49 53 STA WAG 8 leaves 3692294 use 3697926 53 PASS exc BUS CPE SDL STA WAG 7 leaves w cover 3704154 use 3697663 53 55 CORVETTE 4 leaves 3706707 use 3711550 56 57 CORVETTE 4 leaves 3711550 use 3751438 54 SDL STA VVAG w HD 8 leaves 3698085 use 3711514 55 PASS exc STA WAG SDL H D 4 leaves 3714243 use 3720952 55 PASS w H D 55 STA VVAG std 5 leaves 3714263 use 3721090 55 PASS w H D 55 SDL std S leaves 3714254 use 3721072 55 PASS w H D 6 leaves 3714272 use 3734010 55 PASS w HD 6 leaves 3719750 use 3734010 55 PASS w HD 6 leaves 3721081 use 3734010 55 PASS w H D 55 STA WAG std 5 leaves 3719738 use 3721090 55 PASS w HD 55 SDL std 5 leaves 3719740 use 3721072 55 D D 1 TON w dual rear wheels 2nd Ser 8 leaves 3720587 use 3719552 55 57 PASS w extra HD 56 57 STA WAG 9 PASS 6 leaves 3730075 use 3734010 Chevrolet Motor General Motors Corporation