38 42 UTILITY 46 55 llg TON lst Ser exc 2 SPD 10 spline l8 teeth 4 3 O D 4 370445 2 8 10 42 46 M OR OS OW OY w H D 46 51 2 TON 16 spline 18 teeth 3661874 2 9 00 40 42 COM 1 46 63 2 TON exc P Trac rear axle 57 59 Ser 3A w 4 WD front axle 16 teeth 3652344 2 6 70 46 54 PASS 53 55 CORVETTE 4 16 teeth stmp d GM R 3682122 2 6 40 46 63 34 1 TON rear axle 57 59 Ser 3E 3G w 4 WD front axle 18 teeth 3681056 2 7 45 46 2 SPD w Mech Shift 16 teeth stmp d 2234 V 204 3682229 2 14 10 46 51 2 SPD w Vac Shift 16 teeth stmp d 2234 T 202 3682526 2 17 85 52 53 2 TON exc 2 SPD 27 spline l8 teeth 3697746 2 9 00 52 53 2 SPD w Vac Shift 27 sp1ine 16 teeth 3698942 2 18 50 54 55 2 TON prod 1st Ser 29 spline forged 3702292 3702292 2 9 00 54 55 2 SPD w Vac Shift lst Ser 29 spline stamped 3703724 3703724 2 18 50 55 62 PASS exc P Trac 56 62 CORVETTE exc P Trac 16 teeth 3748257 2 6 40 58 59 Q TON w P Trac right and left 20 splines 2370717 2 3 70 57 62 PASS CORVETTE w P Trac 63 PASS w P Trac daub of orange paint 3744618 2 3 70 60 62 Ser 10 w P Trac 16 teeth 17 splines Eot0n 40251 3772616 2 7 70 60 63 4 WD front axle 16 teeth Dana 31487 3779581 2 6 70 61 63 Ser 20 30 w P Trac 4 17 splines 22Y3g O D 4 2426038 2 16 65 63 PASS CORVETTE right and left 3820638 1 6 40 63 CORVETTE w P Trac Dano 32262 3830741 2 63 Ser 10 w P Trac Eaton 40334 1 3830669 2 7 70 iNOTE When using 3744618 in place 3745317 it may be necessary to use 2370715 pinion 5 529 GEAR ASSEMBLY Ring und Pinion not sold separately NOTE See group 5 510 for truck pinion with gear riveted to differential cose NOTE Part numbers in parentheses are stamped on ring gear and pinion respectively 39 42 VF WD Y M w 2 SPD 19 8T 38891 4117 389OL 222 603771 1 67 30 40 52 PASS exc P G 41 l1T hypoid 595022 3652285 604397 1 4095 if 40 52 PASS exc P G 53 SDL 37 9T hypoid 3652178 3704417 3705430 1 47 20 40 53 M TON 37 9T l1ypoid 3652510 3704461 3705439 1 47 20 40 WD 41 55 112 TON lst Ser 38 7T hypoid 3652282 3652547 2352908 1 63 00 40 WD 41 55 UTILITY lst Ser 37 6T hypoid 3652522 3552549 604427 1 62 60 46 60 TON exc D D rear axle 57 59 Ser 3E w 4 WD front axle 32 7T hypoid 3682104 03 609797 1 53 90 46 59 D D 1 TON 60 Ser 20 D D 60 Ser 30 rear axle 57 59 Ser 3G w 4 WD front axle 36 7T hypoid 3682146 45 609798 1 53 90 46 2 SPD w Mech Shift 19 8T 3889K193 3890 270 609846 1 73 45 46 55 2 SPD w Vac Shift Io ratio lst Ser 23 8T 3889M221 3890C 289 609962 1 87 55 50 54 PASS w P G 39 11T hypoid 369146 3704411 3705262 1 44 40 53 PASS Reg Prod exc P G SDL 54 PASS Reg Prod exc P G 37 10T hypoid 3697720 3703799 3705261 1 44 40 53 55 CORVETTE 39 1 1T 11ypoid 3691464 3704479 3748436 1 45 70 54 TON 39 l 0T hyp0id 3697702 O3 3707516 1 45 70 54 55 2 SPD w Vac Shift hi ratio lst Ser 22 7T 3889R252 38905 331 3707547 1 87 55 55 56 PASS exc P G O D 56 CORVETTE w 3 SPD r 37 10T hypoid 3725864 3733910 3748433 1 45 70 55 56 PASS w P G 56 CORVETTE w P G 32 9T l1ypoid 3731604 3731 617 3748430 1 45 70 55 59 PASS w O D lst design 57 62 CORVETTE 62 63 PASS w 4 11 ratio 37 9T hypoid 3733908 3733912 3748434 1 45 70 70 Chevrolet Motor General Motors Corporation