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Richmond Gear 4900991 Ring and Pinion Set 3.73 Ratio GM 8.2 10-Bolt

(Chevrolet Corvette 1955-62, Impala 1958-64, El Camino 1959-60, 1964, Chevy II 1962-64, Bel Air 1955-64, Biscayne 1958-64, Nomad 1955-61 + 2 more models)

Part of: Richmond Gear Excel Differential Ring and Pinion Set

Other options in this family: Richmond Gear F9411 Richmond Gear F88410 Richmond Gear 4900391 Richmond Gear 12BC373T Richmond Gear 6903041

Manufacturer

Picture for manufacturer Richmond Gear

Part Number

4900991
5 reviews
Sale Price

$358.53

1 left at this price

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Product Details

The Richmond Gear 49-0099-1 is a high-performance ring and pinion gear set engineered for GM 8.2-inch 10-bolt differentials found in 1955-1964 Chevrolet vehicles and 1955-1962 Corvettes. This precision-manufactured gear set features a 3.73:1 ratio with 41 ring gear teeth and 11 pinion teeth, providing improved acceleration and performance for street and performance applications.

Key Specifications:

  • Gear ratio: 3.73:1 (41 ring gear teeth, 11 pinion teeth)
  • Ring gear diameter: 8.2 inches
  • Pinion shaft diameter: 1.438 inches
  • Pinion spline count: 17 splines
  • Ring gear bolts: 10-bolt pattern
  • Carrier series: 3 (fits 3.08 to 3.70 carrier)
  • Material: Premium 8620 steel construction
  • Front-load dropout design for early model applications

Richmond Quality and Performance:

Richmond Gear sets are computer-controlled manufactured with precision tolerances of 1/1000th of an inch, ensuring optimal gear contact patterns and quiet operation. Each gear undergoes specialized heat treatment for maximum strength and durability. The pinion threads are ground to precise specifications for trouble-free installation and proper bearing preload. These gears are engineered to meet or exceed OEM specifications while providing the performance edge demanded by enthusiasts and racers.

This ring and pinion set is sold complete and requires a master installation kit (sold separately) for proper setup. Richmond Gear has been the trusted choice of professional racers for over 80 years, with proven performance at both the Daytona 500 and NHRA U.S. Nationals.

Products specifications

Fits

Chevrolet Corvette 1955-62, Impala 1958-64, El Camino 1959-60, 1964, Chevy II 1962-64, Bel Air 1955-64, Biscayne 1958-64, Nomad 1955-61, One-Fifty Series 1955-57, Two-Ten Series 1955-57

Calculator

Gear Ratio Calculator

Carrier Series

3

Cover Bolts

10

Installation Kit Included

No

Notes

Early model (1955-64) front load. Fits 3.08 to 3.70 carrier.

Pinion Gear Teeth

11

Pinion Shaft Diameter (in)

1.438 in.

Pinion Spline Count

17

Quantity

Sold as a set.

Ring and Pinion Ratio

3.73:1

Ring Gear Bolts

10

Ring Gear Diameter (in)

8.200 in.

Ring Gear Rotation

Standard

Ring Gear Teeth

41

Tool

Transmission Lookup

Ring Gear Tooth Quantity

37

Pinion Gear Tooth Quantity

10

Ring Gear Diameter

8.2

Cover Bolt Quantity

Dropout

Ring Gear Material

8620 Steel

Differential Case Design Type

GM 8.2 (55-64)

Differential Carrier Break

3.08 to 3.70

Pinion Shaft Diameter

1.438

Ring Gear Bolt Quantity

10

Ring and Pinion Gear Ratio

3.73

Prop 65

WARNING: Cancer - www.p65warnings.ca.gov

Position

Rear

Great price on a new tonneau cover for my '08 Honda Ridgeline.

good service, good merchandise.

I found exactly what I was looking for and it was listed for a very awesome price! Matter of fact it was lower than any other store I had found that part on. Shipping was super quick and I will totally shop from Autoplicity again!

Super easy + best price on the web. Very pleased am I.

Order arrived fast. They were definetly the cheapest of all the online retailers.

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