CHEVROLET PARTS AND ACCESSORIES CATALOG PART NO LIST YEAR MODEL IPART NAME No USED Plucn 4 003 TRANSMISSION ASSEMBLY len hand lbrake 41 48 PASS 591187 1 111 50 48 54 COMM 3 SPD exc hvy duty see NOTE I 3845029 1 123 00 48 50 ALL 51 57 COMM 4 SPD see NOTE ll 591703 1 174 50 49 54 PASS exc P G 3709812 1 123 00 51 57 UTIL 4 SPD includes prop shaft brake 591550T 1 205 00 54 57 I Q TON w H T 8615375 1 339 00 55 56 PASS exc P G O D see NOTE III 3731850 1 123 00 55 56 PASS w P G 6 cyl 3719238 1 277 25 55 56 PASS w P G 8 cyl 3719241 1 277 25 55 56 TON 3 SPD exc O D hvy duty see NOTE IV 3845197 1 123 00 55 TON lst Ser 55 56 COMM 3 SPD hvy duty 2nd Ser see NOTE V 3731577 1 162 50 55 56 TON 3 SPD exc hvy duty see NOTE VI 3845143 1 123 00 55 56 CORV 3 SPD 8 cyl see NOTE V11 3731933 1 140 00 55 57 ALL w H T 2nd Ser exc 1 Q TON 8615385tT 1 398 50 56 57 PASS 3 SPD close ratio 2nd design See Hvy Du ty parts section for lst design 3731937 1 123 00 57 PASS exc A T O D close ratio 3740406 1 123 00 57 PASS 6 cyl w P G 3738791 1 277 25 57 PASS 8 cyl w P G exc dual 4BC 3738793 1 277 25 57 CORV 3 SPD 3737326 l 150 00 57 TON 3 SPD exc O D hvy duty 3737329 1 123 00 57 E3 TON 3 SPD exc hvy duty l 3737334 1 123 00 57 Ser 3 3 SPD hvy duty 3731577 1 162 50 NOTE I Ori TON models remove U joint rear brg support and replace w 3845019 rear brg support 3845092 U joint rt yoke 3845023 rear brg oil slinger and replace speedometer drive gear by 3692234 speedlometer drive gear unit NOTE II Rear bearing retainer output flange and speedo gears may differ from same prod models Transfer such items from replaced transmission or obtain new from service parts stock NOTE III When replacing transmission it will be necessary to install new levers 3845093 lst and reverse and 3708667 on 1955 or 3728300 on 1956 2nd and 3rd or 1 transfer old levers NOTE IV When replacing transmission both the lst and reverse 2nd and 3rd shifter shaft and plate assys or the trans cover assy will have to be transferred from the old trans NOTE V On A 1 TON models remove rear brg ret assy and replace with 3721040 retainer assy Transfer old U joint front flange and brake drum assy It may be necessary to replace both outer shifting levers from old transmission NOTE VI When replacing transmission the speedo driven gear may have to be replaced with 3845071 Also both lst and reverse 2nd and 3rd shifter shaft and plate assy or the trans cover assy will have to be transferred from the old trans NOTE VII When installing on 1955 model or 1956 models with 3 27 axle ratio the speedo driven gear and shaft assy 3726645 must be replaced by speedo driven gear 3708142 NOTE Not used w dual shoe prop shaft brake See illustration at group 5 610 TNOTE Used w dual shoe prop shaft brake See illustration at group 5 610 TTNOTE Require oil cooler on hvy duty jobs NOTE When using as a replacement for transmission to serial No C 206 it will be neces sary to use 3 3722375 Bolt 4 120383 Washer 1 120370 Nut and increase hole in rear engine mounts to 4 004 I IT CONTROL ASSY Transmission 37 39 PASS COMM 40 47 COMM 3 SPD gearshift lever 609928 l 1 35 37 53 PASS exc P G t thrust washer and needle brg 3692617t 1 1 35 41 54 COMM 3 SPD 41 53 PASS hvy duty 54 PASS thrust washer and needle brg 3711626 1 3 60 55 57 PASS COMM exc hvy duty thrust washer and needle brg 37250351 1 4 70 359 4 003 4 004 M