GM Rear Axle
Identified by casting #’s, physical characteristics/appearance, cover bolts (10 or 12) & code stamped in axle tube.
Click the above picture to view full size. Other obvious giveaways as to an axles origin is a leaf sprung car will be either a Camaro or Nova while a coil sprung car will be an A-Body or B-Body.
Chevrolet or “C” type rear ends typically have C-clips retaining the axles. Buick/Olds/Pontiac axles are typically retained with bearings.
Mopar Rear Axle
Identified by casting number & number of cover bolts. The 8.75 (8 3/4) rear end LOADS FROM THE FRONT and IS THE ONLY REAR END THAT DOESN’T HAVE A REAR COVER.
| Casting # | Year | Body | Size | Notes |
| 2070051 | 1960 – 71 | A | 7.25 | 9 bolt cover |
| 2070062 | 1970 – 71 | A | 7.25 | |
| 3507881 | 1972 – 74 | A | 7.25 | |
| 2852905 | 1969 – 70 | B | 8.25 | 10 bolt cover |
| 3723598 | 1971 – 74 | B | 8.25 | |
| 3723599 | 1971 – 74 | B | 8.25 | |
| 1634985 | 1957 – 67 | ABCD | 8.75 | 10 studs/no rear cover |
| 1820657 | 1958 – 64 | C | 8.75 | |
| 2070741 | 1964 – 74 | ABCE | 8.75 | |
| 2070742 | 1959 – 68 | BCD | 8.75 | |
| 2881489 | 1969 – 74 | ABCE | 8.75 | |
| 3507890 | 1973 – 74 | B | 9.25 | 12 bolt cover |
| 3507891 | 1973 – 74 | B | 9.25 | |
| Dana 60 | 1966 – 72 | B | 9.75 | 10 bolt cover |
| Dana 60 | 1970 – 71 | E | 9.75 |
