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  See more parts for Buick Apollo
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Richmond Gear 3.90 Thick Ring and Pinion GM 7.5" 7.625" Buick | Cadillac | Chevrolet | GMC | Isuzu | Oldsmobile | Plymouth | Pontiac 1975-2005 - 49-0285-1
Richmond Gear 3.90 Thick Ring and Pinion GM 7.5" 7.625" Buick | Cadillac | Chevrolet | GMC | Isuzu | Oldsmobile | Plymouth | Pontiac 1975-2005 - 49-0285-1 - Image 2 Richmond Gear 3.90 Thick Ring and Pinion GM 7.5" 7.625" Buick | Cadillac | Chevrolet | GMC | Isuzu | Oldsmobile | Plymouth | Pontiac 1975-2005 - 49-0285-1 - Image 2
Richmond Gear is the leading manufacturer of professional quality, high-performance drivetrain products. Our complete line of products ranges from high performance ring-and-pinion sets for serious street and racing applications to torque-hungry manual transmissions and components. Richmond Gear products have been winners both at the Daytona 500 and U.S. Nationals for decades. WINNERS RUN RICHMOND!


Specifications:
  • App Model: GM 7.5, GM 7.6 IFS, GM 7.625
  • Cover Bolt Quantity: 10
  • Differential Carrier Break: 3.08 Ratio and Lower
  • Differential Case Design Type: GM 7.5, GM 7.6 IFS, GM 7.625
  • Gear Ratio: 3.90
  • Pinion Gear Tooth Quantity: 10
  • Pinion Shaft Diameter: 1.438 (Inch)
  • Pinion Spline Count: 27
  • Ring Gear Bolt Quantity: 10
  • Ring Gear Material: 8620 Steel
  • Ring Gear Outside Diameter: 7.5 (Inch)
  • Ring Gear Rotation: Standard
  • Ring Gear Tooth Quantity: 39
  • Taxonomy A: LD Differential
  • Taxonomy B: Ring and Pinion
  • Taxonomy C: Front, Rear
  • Taxonomy D: 3.90

Notes:

  • For GM 7.5"/7.625" (10 Bolt)
  • 3.90 Ratio
  • Thick Ring Gear
  • Requires a 3.08 and Numerically Lower Ratio Carrier

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
1973-1975
 Buick Apollo
1977-1981
 Buick Century
1991-1996
 Buick Commercial Chassis
1976-1985
 Buick Electra
1977-1983
 Buick Estate Wagon
1975-1985
 Buick LeSabre
1977-1987
 Buick Regal
1977-1978
 Buick Riviera
1991-1996
 Buick Roadmaster
1975-1979
 Buick Skylark
1987-1990
 Cadillac Brougham
1982-1984
 Cadillac DeVille
1982-1990
 Cadillac Fleetwood
1985-2005
 Chevrolet Astro
1987-2001
 Chevrolet Blazer
1982-2002
 Chevrolet Camaro
1977-1996
 Chevrolet Caprice
2004-2013
 Chevrolet Colorado
1977-1987
 Chevrolet El Camino
1977-1985, 1994-1996
 Chevrolet Impala
1983-1986
 Chevrolet K5 Blazer
1973-1983
 Chevrolet Malibu
1978-1988
 Chevrolet Monte Carlo
1976-1979
 Chevrolet Nova
1982-2004
 Chevrolet S10
2004-2012
 GMC Canyon
1983-2005
 GMC Jimmy
1982-1990
 GMC S15
1985-1989, 1991-2000
 GMC Safari
1991-2004
 GMC Sonoma
1991
 GMC Syclone
2006-2010
 Hummer H3
2009-2010
 Hummer H3T
1988
 Isuzu Pickup
1991-2002
 Isuzu Rodeo
1977-1984
 Oldsmobile 98
1991-1994, 1996-2004
 Oldsmobile Bravada
1977-1984
 Oldsmobile Custom Cruiser
1977-1981
 Oldsmobile Cutlass
1978-1984
 Oldsmobile Cutlass Calais
1980-1983
 Oldsmobile Cutlass Cruiser
1978-1980
 Oldsmobile Cutlass Salon
1982-1984
 Oldsmobile Cutlass Supreme
1977-1985
 Oldsmobile Delta 88
1976-1979
 Oldsmobile Omega
1975-1986
 Pontiac Bonneville
1977-2002
 Pontiac Firebird

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Who is Richmond Gears?

Richmond Gears is a company that was founded in 1915 and is based in Liberty, South Carolina, that specializes in manufacturing high-quality drivetrain components for the automotive industry. They have been in the business for more than 80 years and have one of the most comprehensive parts lists in the market. 

Today, they are considered one of the go-to brands of many professional mechanics, DIY customers, and tuners.

Continuous Development

The company never stops in its search for innovative ways to improve its products. It is why many hot rod builders and racers around the world choose Richmond Gears. It allows them to customize their drivetrain according to their need. 

Designed to Perform

Each product is engineered to perform even in the harshest condition. Every component is precisely cut using the most advanced cutting tool in the industry. It allows them to create pieces with very tight tolerances and guarantees that perfect fit.

Purchase Richmond Gears At Vivid Racing

If you are in the market for high-quality drivetrain components and want something that could take the abuse of high horsepower engines, then Richmond Gears is the brand for you. 

It offers ring and pinion sets and transmissions, and accessories, synthetic gear oils, installation kits, instructional videos, spools and mini-spools, transmission fluids, and rear-end lubes. They also have parts for vehicles made from the 1940s, making them a favorite brand of many classic car owners.

To know more about Richmond Gears, visit Vivid Racing and check out their list of offers that fit your needs.

Richmond's Warranty

Our commitment to quality is backed by some of the best warranty coverage in the industry. Richmond Performance products are warranted against defects for a period of two (2) year under normal driving conditions.

Installation Instructions

Click to view the Installation Instructions here

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