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Richmond Gear 6901851 Ring and Pinion Set 4.56 Ratio Ford 9 Inch

(Ford F-150 1975-86, Mustang 1965-73, Bronco 1966-86, Thunderbird 1955-79, Maverick 1970-77, Galaxie 500 1962-74, F-100 1975-83 + 23 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

6901851
6 reviews
Sale Price

$344.03

4 left at this price

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Usually delivered within 2 days

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Product Details

The Richmond Gear 69-0185-1 Ring and Pinion Set is engineered for high-performance street and racing applications in Ford 9-inch rear differentials. This precision-matched gear set features a 4.56:1 gear ratio, delivering enhanced torque multiplication and acceleration for demanding driving conditions.

Technical Specifications:

  • Gear Ratio: 4.56:1 (41 ring gear teeth / 9 pinion gear teeth)
  • Ring Gear Diameter: 9 inches with 10-bolt mounting pattern
  • Ring Gear Material: Heat-treated 8620 steel for maximum strength
  • Pinion Shaft Diameter: 1.313 inches
  • Pinion Spline Count: 28 splines
  • Differential Type: Ford 9-inch (dropout style)

Performance Features:

  • Computer-controlled manufacturing ensures precision tolerances within 1/1000th of an inch
  • Special heat treatment process provides exceptional durability and wear resistance
  • Ground pinion threads for trouble-free installation
  • Lapped and matched gear sets for quiet operation and optimal tooth contact
  • Proven in professional racing at both Daytona 500 and NHRA U.S. Nationals

Richmond Gear has been the trusted choice of professional racers and performance enthusiasts for over 80 years. Each gear set undergoes rigorous testing and quality control to meet or exceed OEM specifications. The 4.56 ratio is ideal for applications requiring improved low-end torque, faster acceleration, and better towing capability. Complete installation instructions included.

Products specifications

Fits

Ford F-150 1975-86, Mustang 1965-73, Bronco 1966-86, Thunderbird 1955-79, Maverick 1970-77, Galaxie 500 1962-74, F-100 1975-83, Fairlane 1957-70, Ranchero 1957-79, Torino 1968-76, Galaxie 1959-67, Gran Torino 1972-76 + 18 more models

Calculator

Gear Ratio Calculator

Cover Bolts

10

Installation Kit Included

No

Pinion Gear Teeth

9

Pinion Shaft Diameter (in)

1.313 in.

Pinion Spline Count

28

Quantity

Sold as a set.

Ring and Pinion Ratio

4.56:1

Ring Gear Bolts

10

Ring Gear Diameter (in)

9.000 in.

Ring Gear Rotation

Standard

Ring Gear Teeth

41

Tool

Transmission Lookup

Pinion Gear Tooth Quantity

9

Ring and Pinion Gear Ratio

4.56

Ring Gear Tooth Quantity

41

Ring Gear Diameter

9

Pinion Shaft Diameter

1.313

Ring Gear Bolt Quantity

10

Ring Gear Material

8620 Steel

Differential Case Design Type

Ford 9

Cover Bolt Quantity

Dropout

Position

Rear

Prop 65

WARNING: Cancer - www.p65warnings.ca.gov

Good prices. Shipping is a bit slow. I would order for autoplicity again.

Lowest price on the INTERNET!!! I searched for days and nobody could even come close to their price. They provided excellent feedback on my order status including shipping and tracking numbers.

Good price but on the Google search shipping was listed as7.98 and in reality was over10.

Fast shipping and great prices. Amazon Payments was a breeze to use.

I would definetly order from Autoplicity again. Fast curtious service they had just what I wanted and the prices were the best I could find.

PART CAME IN FAST!!! Can't wait to tear it open

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