Differential Ring and Pinion (12 Bolt)

11100
11099
11101
11102
11103

49-0050-1 Application Notes

  • For GM 8.5" O Axle (12 Bolt)
  • 3.90 Ratio
  • Thick Ring Gear
  • Requires a 2.93 to 3.23 Ratio Carrier

Warranty

2 Years or 100,000 Miles

49-0050-1 Specifications

App Model GM 8.5
Cover Bolt Quantity 12
Differential Carrier Break 2.93 to 3.23 Ratio
Differential Case Design Type GM 8.5
Gear Ratio 3.90
Pinion Gear Tooth Quantity 10
Pinion Shaft Diameter 1.626 (Inch)
Pinion Spline Count 27
Ring Gear Bolt Quantity 10
Ring Gear Material 8620 Steel
Ring Gear Outside Diameter 8.5 (Inch)
Ring Gear Rotation Standard
Ring Gear Tooth Quantity 39
Taxonomy A LD Differential, LD Differential, LD Differential
Taxonomy B Ring and Pinion, Ring and Pinion, Ring and Pinion
Taxonomy C Rear, Rear, Rear
Taxonomy D 3.90, 3.90, 3.90
Where to buy

Vehicle Applications

  • 1964 – 1971 Oldsmobile 442
  • 1968 – 1972 Oldsmobile Cutlass
  • 1968 – 1972 Oldsmobile Cutlass Supreme
  • 1965 – 1981 Pontiac Catalina
  • 1965 – 1971 Pontiac GTO
  • 1964 – 1972 Pontiac LeMans
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov