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Richmond Gear 6900451 Ring and Pinion Set 4.10 Ratio Mopar 8.75" 742 Case

(Chrysler 300 1957-68, Town & Country 1957-74, Newport 1957-74, New Yorker 1957-74, Imperial 1957-74; Dodge Charger 1966-70, Challenger 1970-74 + 25 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

6900451
4 reviews
Sale Price

$320.49

1 left at this price

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Usually delivered within 2 days

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Product Details

The Richmond Gear 6900451 is a professional-grade ring and pinion gear set engineered for Chrysler 8.75-inch differentials with 742 casting numbers. This set features a 4.10:1 gear ratio with a 10-spline pinion design, delivering optimal performance for both street and performance applications.

Key Features:

  • 4.10:1 gear ratio for improved acceleration and towing capability
  • Compatible with Mopar 8.75-inch differentials with 742 case
  • 10-spline pinion shaft design
  • Precision-ground pinion threads for trouble-free installation
  • Manufactured using state-of-the-art racing-developed engineering
  • Heat-treated for enhanced strength and durability

Richmond Gear has been the trusted choice of professional racers for decades, with winning credentials at both the Daytona 500 and U.S. Nationals. Each gear set undergoes rigorous quality control to ensure proper tooth contact patterns and long service life. This complete ring and pinion set includes everything needed for a professional installation when combined with the appropriate bearing and installation kit.

Products specifications

Fits

Chrysler 300 1957-68, Town & Country 1957-74, Newport 1957-74, New Yorker 1957-74, Imperial 1957-74; Dodge Charger 1966-70, Challenger 1970-74, Dart 1968-72, Coronet 1965-71, Polara 1962-73, D100 Pickup 1968, Monaco 1965-74 + 20 more models

Calculator

Gear Ratio Calculator

Cover Bolts

10

Installation Kit Included

No

Pinion Gear Teeth

10

Pinion Shaft Diameter (in)

1.750 in.

Pinion Spline Count

10

Quantity

Sold as a set.

Ring and Pinion Ratio

4.10:1

Ring Gear Bolts

12

Ring Gear Diameter (in)

8.750 in.

Ring Gear Rotation

Standard

Ring Gear Teeth

41

Tool

Transmission Lookup

Ring Gear Bolt Quantity

12

Ring Gear Diameter

8.75

Differential Case Design Type

Chrysler 8.75 (742)

Pinion Shaft Diameter

1.75

Ring Gear Tooth Quantity

41

Cover Bolt Quantity

Dropout

Ring Gear Material

8620 Steel

Ring and Pinion Gear Ratio

4.10

Pinion Gear Tooth Quantity

10

Position

Rear

Prop 65

WARNING: Cancer - www.p65warnings.ca.gov

Best Price

Great transaction at a great price.

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.

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