6 1 BRAKES REAR AXLE AND DRIVE 5 517 SI IAFT Differential Pinion Con t 1 70 Ser 20 Conv 71 72 Ser 20 Conv 6 cyl 71 72 G 30 6 cyl 3993449 1 Note 1 w 2 pinion bearing I 64 88 G 10 w P Trac 3 36 ratio 3830742 1 1 Dana 32266 NOTE 2 Use with 1rough differential case 1 64 68 Ser 10 w P Trac 3 73 ratio 2nd design exc 4 WD 1 64 G 10 3 73 ratio 1 1 65 66 G 10 w P Trac 3 73 4 11 I ratio 87 Ser 10 4 WD w P Trac 3889308 A R 0 0 x 5 N Dana 33270 65 71 G 10 w P Trac 3 08 3 36 r V ratio 9776894 1 O D x 4 O L Eaton ED 6960 85 671 Ser 20 w leaf type springs 1 exc P Trac 1 88 70 Ser 10 3 54 ratio 4 Spd 1 w 396 V 1 A 88 70 Ser 20 3 54 ratio 396 88 70 Ser 20 4 10 ratio exc power lock 1 gx 88 70 Ser 20 w leaf type spring 4 56 ratio exc power lock 71 72 Ser 20 Conv w Dana Axle 1 exc power lock 2358883 1 5 az 0 L x O D Dana 30263 1 85 67 Ser 20 leaf type springs a 4 w P Trac 1 P 68 70 Ser 20 3 54 ratio power lock w leaf type spring 1 68 70 Ser 20 4 56 4 10 ratio 1 w power lock 2392354 2 5 O L Dana 31041 5 518 SCREW PIN Pinion Shaft Lock 38 42 Comm I 48 72 g Ton exc P Trac I 87 72 G 10 20 70 72 Blazer 472546 1 18 1 83 72 Ser 10 w P Trac 3 07 3 73 ratio 1 65 72 G 10 w P Trac 3 73 4 1 1 1 ratio 87 72 G 20 A 1 1 70 72 Blazer 3830672 1 Eaton ED 92994 85 70 G 10 w P Trac 3 36 ratio 3869319 1 Eaton 93465 I 80 72 4 WD i I 85 87 Ser 10 w leaf type springs 1 exc P Trac 89 Blazer 70 72 4 WD BIazer 2402527 1 PIN front axle 1 Dana 13449 61 82 Ser 20 exc 0 D 4 WD 1 1 82 Ser 20 4 WD 83 89 Ser 20 exc D D 70 72 Ser 20 4 WD 6 cyl w 4 57 1 ratio 70 72 Ser 20 Conv w 4 10 4 57 ratio exc P Trac 71 72 G 30 w 4 1 0 4 57 ratio 6 cyl 3813397 1 PIN dia x 0 Q 5 520 SPIDER Differential Pinion NOTE 1 For 2nd design use 3993449 Shaft Group 5 517 and 3813397 Pin Group 5 518 48 72 Ser 20 30 exc 11 000 Ib axle 1 1 71 72 G 30 3883696 1 forged 3663696 Note 1 81 89 Ser 20 30 exc 4 WD I 70 Ser 20 30 I 1 71 72 All w P Trac 2428675 1 cl ctr cam w snap ring Det Auto 63041 87 72 Ser 30 w 11 000 Ib axle 370429 1 I forged 3656895 5 528 GEAR Differential Pinion NOTE 1 Use with side gears with groove NOTE 2 When using 2370715 in place 0f137453 13 3744618 side gear must also be used NOTE 3 Use with side gears without groove a 38 42 Comm 48 83 Ton exc P Trac 370225 2 10 teeth shaft hole 48 87 Ton Ist desig n exc 1 P Trac 1 1 000 Ib axle rear LL GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TL REV 5 79 5 31 5 517 5 526