12 Bolt 8.75 Corporate


12 bolt Eaton Housing assembly 10 bolt cover  Yoke velocity coupler

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

SOME 73-77 A-BODY WERE 28 OR 31 C-CLIP AXLES TOO.
Pinion Spline 30 constant velocity joint coupler or Mechanics 3R U-Joint (A-body)
Pinion Diameter 1.875 (1971-1976) 1.625 (1978-1985)
Axle Shaft Diameter 1.531 1.563 (65-70) (71-76)
 1.40 (A-body 73-77 and 77-85 B-body)

 

Supported Cars

Car Year
Electra / Rivera 71-76 5" bolt pattern (non 455 CID)
Monte Carlo / Regal /
Grand Prix / Malibu (rare)
73-77 4 3/4 bolt pattern
Impala / Caprice / Wagon 71-77 5" bolt pattern
Cadillac 71-77 5" bolt pattern
Bonneville Executive 71-76 5” bolt pattern
Grandville 71-77 5" bolt pattern
Olds 98 / 88 71-77 5" bolt pattern (non 455 CID)

 

Rebuild Kit

Part Part Number
Carrier Bearing LM603049
Carrier Bearing (Race) LM603012
Inner Pinion Bearing M88048
Inner Pinion Bearing (Race) M88010
Outer Pinion Bearing M802048
Outer Pinion Bearing (Race) M802011
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