My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Richmond Gear 6902041 Ring and Pinion Set 4.10 Ratio GM 12-Bolt Truck

(GMC G2500 1979-81, K1500 1979-82, C1500 1979-82, Jimmy 1970-81, C15/C1500 Pickup 1967-74, 1979-81, C2500 1979-81, K1500 Suburban 1979-82 + 56 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

6902041
5 reviews
Sale Price

$331.54

1 left at this price

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Richmond Gear 6902041 is a professional-grade 4.10:1 ratio ring and pinion gear set designed for GM 8.875-inch (12-bolt) truck differentials, sold as a complete set. This 4 Series gear set features 37 ring gear teeth and 9 pinion teeth with a 30-spline pinion, engineered for both high-performance street and racing applications.

Key Features:

  • Computer-controlled manufacturing from foundry to cutting gears at 1/1000th of an inch precision, with heat-treating for consistently strong gears
  • Ground pinion threads for trouble-free installation and special heat treatment for improved strength
  • 30-spline pinion design for GM 8.875-inch 12-bolt truck applications
  • Compatible with 3.73:1 or numerically higher carriers only
  • Engineered to meet or exceed OEM specifications

Richmond Gear is the leading manufacturer of professional-quality, high-performance ring and pinion sets, with superior quality resulting from years of racing development, outstanding design, and state-of-the-art manufacturing methods. For over 80 years, the Double Diamond has signified the highest quality gears in the racing industry.

Products specifications

Fits

GMC G2500 1979-81, K1500 1979-82, C1500 1979-82, Jimmy 1970-81, C15/C1500 Pickup 1967-74, 1979-81, C2500 1979-81, K1500 Suburban 1979-82, G25/G2500 Van 1967-81, C1500 Suburban 1979-81, K15/K1500 Pickup 1966-74 + 53 more models

Calculator

Gear Ratio Calculator

Carrier Series

4

Cover Bolts

12

Installation Kit Included

No

Notes

3.73:1 or numerically higher carrier.

Pinion Gear Teeth

10

Pinion Shaft Diameter (in)

1.438 in.

Pinion Spline Count

30

Quantity

Sold as a set.

Ring and Pinion Ratio

4.10:1

Ring Gear Bolts

12

Ring Gear Diameter (in)

8.875 in.

Ring Gear Rotation

Standard

Ring Gear Teeth

41

Tool

Transmission Lookup

Differential Case Design Type

GM 8.875 Truck

Ring and Pinion Gear Ratio

4.11

Differential Carrier Break

3.73 and Higher

Ring Gear Diameter

8.875

Pinion Shaft Diameter

1.438

Ring Gear Material

8620 Steel

Ring Gear Bolt Quantity

12

Ring Gear Tooth Quantity

37

Pinion Gear Tooth Quantity

9

Cover Bolt Quantity

12

Prop 65

WARNING: Cancer - www.p65warnings.ca.gov

Position

Rear

smooth transaction. good seller.

Great transaction at a great price.

shipping was fast and great prices! thank you!

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

I am extremely satisfied with Autoplicity in terms of service, price, and shipping. I was shopping for a set of N-FAB step bars for my truck and was ready to purchase from Amazon when I decided to look around to see if there were better prices. I stumbled upon Autoplicity and was surprised to see their price on the bars. I checked with their online chat customer service to confirm that they would fit my truck and that the price was for a pair of the bars and not just one. (That's how low the price was!). I then placed my order and the bars arrived at my doorstep 3 days later! Autoplicity gets an A+ in my book and I'll definitely be coming back.

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy