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Richmond Gear 49-0095-1 Ring and Pinion Set 3.55:1 Ratio GM 12-Bolt

(Chevrolet Camaro 1967-72, Impala 1965-72, Malibu 1965-67, Chevelle 1964-73, Caprice 1966-72, El Camino 1965-73, Monte Carlo 1970-72 + 42 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

4900951
8 reviews
Sale Price

$368.27

2 left at this price

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Usually delivered within 2 days

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Product Details

The Richmond Gear 49-0095-1 is a professional-grade ring and pinion set engineered specifically for GM 8.875-inch (12-bolt) passenger car differentials. Featuring a 3.55:1 gear ratio, this set delivers an excellent balance of acceleration and drivability for both street performance and occasional track use.

Technical Specifications:

  • Gear Ratio: 3.55:1 (39 ring gear teeth / 11 pinion gear teeth)
  • Ring Gear Diameter: 8.875 inches
  • Material: Premium 8620 steel construction for superior strength and durability
  • Pinion Shaft Diameter: 1.625 inches with 30-spline count
  • Carrier Series: 3 Series (fits 3.07 to 3.73 ratio carrier break)
  • Ring Gear Bolt Count: 12 bolts
  • Cover Bolt Count: 12 bolts

Precision Manufacturing: Richmond ring and pinion sets are computer-controlled manufactured with precision cutting to 1/1000th of an inch tolerance, followed by specialized heat treatment for maximum strength and quiet operation. This meticulous process ensures proper gear tooth contact and extended service life.

Application: Designed for GM 8.875-inch (12-bolt) passenger car differentials found in classic muscle cars and performance vehicles from 1964-1973, including Chevrolet Camaro, Chevelle, and Impala; Pontiac GTO and Firebird; Oldsmobile 442; and Buick models. Sold as a complete matched set ready for installation.

Installation Note: Requires a 3.07 to 3.73 ratio carrier. If replacing ratios outside this range, carrier replacement may be necessary. Professional installation with proper setup tools and installation kit (sold separately) is recommended for optimal performance and longevity.

Products specifications

Fits

Chevrolet Camaro 1967-72, Impala 1965-72, Malibu 1965-67, Chevelle 1964-73, Caprice 1966-72, El Camino 1965-73, Monte Carlo 1970-72, Nova 1964-67, 1969-72, Chevy II 1964-68, Bel Air 1965-70; Pontiac GTO 1965-72, Firebird 1967-72 + 37 more models

Calculator

Gear Ratio Calculator

Carrier Series

3

Cover Bolts

12

Installation Kit Included

No

Pinion Gear Teeth

11

Pinion Shaft Diameter (in)

1.625 in.

Pinion Spline Count

30

Quantity

Sold as a set.

Ring and Pinion Ratio

3.55:1

Ring Gear Bolts

12

Ring Gear Diameter (in)

8.875 in.

Ring Gear Rotation

Standard

Ring Gear Teeth

39

Tool

Transmission Lookup

Differential Case Design Type

GM 8.875 Car

Pinion Gear Tooth Quantity

11

Ring Gear Bolt Quantity

12

Differential Carrier Break

3.07 to 3.73

Pinion Shaft Diameter

1.625

Ring Gear Material

8620 Steel

Cover Bolt Quantity

12

Ring and Pinion Gear Ratio

3.55

Ring Gear Tooth Quantity

39

Ring Gear Diameter

8.875

Position

Rear

Prop 65

WARNING: Cancer - www.p65warnings.ca.gov

Best prices, fast shipping, good service. Thank you!

Great prices and shipped promptly.

So far so good

Seller is fast, selection is great, website is well organized. Prices are some of the best online and very competitive. Order # 12377 for J. Park

BEST PRICE AROUND, HANDS DOWN. Shipping was fast and communication was impeccable. THANKS FOR THE PROFESSIONALISM.

best prices around by far for the exact same product! Would definetely recomend autoplicity to a friend

the product was the cheapest price i could find on the web and shipping was quick i got the part in two days from purchase

Wonderful experience with seller. Ordered on a Monday night and received on Thursday. Talking about service. Man these guys are awesome. I will be ordering more in the future with Autoplicity. Thanks again!

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