10 BOLT COVER 12 Bolt RING GEAR 8.875 OR 8.75
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| 12 bolt Eaton | Housing assembly | 10 bolt cover | Yoke velocity coupler 71-85 |
| Ring Gear Diameter | 8.875 (1965 -1976) 8.75 (1977-1985) |
| Casting number(s) | |
| Ring Gear | 12 |
| Cover Bolts | 10 |
| Ring Gear Bolt Size | 7/16 Left Hand Thread |
| Axle Spline |
28 (77-85 only) and 31 spline c-clip &
Bolt in axles |
| Pinion Spline | 30 constant velocity joint coupler or Mechanics 3R U-Joint (A-body) |
| Pinion Diameter | 1.875 (1965-1976) 1.625 (1977-1985) |
| Axle Shaft Diameter | 1.531 1.563 (65-70) (71-76) 1.40 (A-body HD 73-77 and 77-85 B-body) |
Supported Cars
| Car | Year |
| Electra / Rivera | 65-76 5" bolt pattern (non 455 CID) |
| Monte Carlo / Regal / Grand Prix / Malibu (rare) |
73-77 4 3/4 bolt pattern |
| Impala / Caprice / Wagon | 71-85 5" bolt pattern |
| Cadillac | 71-76 5" bolt pattern |
| Bonneville, Executive | 65-76 5” bolt pattern |
| Grandville | 71-76 5" bolt pattern |
| Olds 98 / 88 | 65-76 5" bolt pattern (non 455 CID) |
Rebuild Kit
| Part | Part Number |
| Carrier Bearing | LM603049 |
| Carrier Bearing (Race) | LM603012 |
| OUTER Pinion Bearing | M88048 |
| OUTER Pinion Bearing (Race) | M88010 |
| INNER Pinion Bearing 77-85 73-77 HD A-BODY | M802048 |
| INNER Pinion Bearing | M804049 |
| INNER Pinion Bearing (Race) 77-85 73-77 HD A-BODY | M802011 |
| INNER Pinion Bearing (RACE) | M804010 |
| Pinion Seal | 2043 |
Mega Axle Bearing Kit
| Part | Part Number |
| Axle Bearing (C-Clip) | 6408 |
| Axle Seal (c-clip) | 8835S |
| Axle Bearing | A10 / Set10 |
| Axle seal | 2689S |