64 CHEVY CHEVELLE w P Trac 3 08 3 36 ratio 2nd design Dana 32630 3848014 2 7 20 65 66 CORVAIR w P Trac right 25 splines 16 teeth Dana 32992 3870781 1 6 95 65 66 CHEVY P Trac w 3 08 3 36 3 55 ratio 65 66 CHEVELLE P Trac w 3 08 3 36 3 70 ratio 10 teeth Dana 33243 2472350 2 8 25 65 66 CHEVELLE w 3 07 3 31 ratio 8 y1 65 66 EL CAMINO w 3 73 ratio 8 cyl interior spline 30 exterior splines 23 teeth 18 2472352 2 8 65 65 66 CHEVY C A C w 3 07 3 31 ratio 327 65 66 CHEVELLE C A C w 2 73 3 07 3 31 ratio 327 exc Sp H Per 65 66 EL CAMINO w 3 73 ratio 8 cyl 30 splines 16 teeth 3846078 2 6 95 65 CHEVY 65 66 CHEVELLE exc 327 P Trac 28 splines 16 teeth 3863725 2 6 60 65 66 CHEVY CHEVELLE P Trac Int spline 28 ext spline 23 18 w 3 08 3 36 3 55 3 70 ratio teeth ED 40334 5 w 10 bolt ring gear 3869344 2 8 1 0 5 529 GEAR UNIT Ring und Pinion 60 ALL w 3 SPD 3 55 to 1 ratio 3795112 1 55 25 60 64 CORVAIR w P G 3 55 to 1 ratio 3781704 1 55 25 60 ALL w 3 SPD 3 89 to 1 ratio 3795108 1 55 25 61 64 CORVAIR exc P G 3 55 to 1 ratio 3781695 1 55 25 61 64 CORVAIR w P G 3 27 to 1 ratio 3781708 1 55 25 60 63 CORVAIR F C w P G 3 89 to 1 ratio 3781706 1 55 25 61 64 CORVAIR exc P G 3 27 to 1 ratio 3781702 1 55 25 61 63 CORVAIR F C exc P G 3 89 to 1 ratio 3781697 1 55 25 62 63 CHEVY 3 36 to 1 ratio 3790900 1 49 75 62 63 CHEVY 3 08 to 1 ratio 3790901 1 49 75 62 63 CHEVY 4 cyl 3 55 to 1 ratio 3790899 1 49 75 64 65 F C exc P G 3 55 to 1 ratio 3848066 l 51 50 3 64 65 F C w P G 3 55 to 1 ratio 3848065 1 51 50 64 65 CHEVY lst design 3 55 to 1 ratio 3852336 1 47 50 64 65 CHEVELLE 1 st design 3 70 to 1 ratio 10 bolt ring gear 3852337 1 47 50 64 65 CHEVY CHEVELLE 1st design 3 08 to 1 ratio 10 bolt ring gear 3846191 1 47 50 64 65 CHEVY CHEVELLE 1st design 3 36 to 1 ratio 10 bolt ring gear 3846193 1 47 50 65 66 CORVAIR w P G 3 27 to 1 ratio 3859228 1 58 75 65 CORVAIR exc P G Turbo 4 lBC 65 CORSA w Turbo 4 1BC 3 55 to 1 ratio 3856569 1 53 30 65 66 CORVAIR w P G 3 55 to 1 ratio 3859829 1 58 75 65 CORVAIR exc P G Air Cond 3 27 to 1 ratio 3859830 1 53 30 65 CHEVELLE 8 cyl exc STD 65 CHEVY P Trac CAC 8 cyl 3 31 to 1 ratio 3865994 1 49 75 66 CHEVY w P Trac 3 55 to 1 ratio 3865995 1 65 66 CHEVELLE 327 exc STD 65 66 CHEVY w P Trac 327 3 07 to 1 ratio 3865996 1 49 75 65 EL CAMINO 8 cyl 3 73 to 1 ratio 3865997 1 53 00 65 CHEVY CHEVELLE w P G 8 cyl 2 73 to 1 ratio 3875267 1 51 25 65 66 CHEVY CHEVELLE w P Trac 4 10 to 1 ratio 3865998 1 65 66 CHEVY CHEVELLE w P Trac 4 56 to 1 ratio 3865999 1 65 66 CHEVY CHEVELLE w P Trac 4 88 to 1 ratio 3865967 1 65 66 CHEVY 2nd design 3 55 1 ratio 3886356 1 47 50 65 66 CHEVY CHEVELLE w 10 bolt ring gear 2nd design 3 36 1 ratio 3886357 1 47 50 65 66 CHEVY CHEVELLE w 10 bolt ring gear 2nd design 3 08 1 ratio 3886358 1 47 50 65 66 CHEVELLE w 10 bolt ring gear 2nd design 3 70 1 ratio 3886359 1 47 50 66 CORVAIR 3 27 1 ratio 3887853 1 66 CORVAIR 3 55 1 ratio 3887854 1 NOTE Axle ratio No of Ring Gear Teeth No of Pinion Gear Teeth 3 1965 5 5286 529 Chevrolet Motor Division CCC 264 General Motors Corporation