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Richmond Gear 6901771 Ring and Pinion Gear Set 3.89 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

6901771
7 reviews
Sale Price

$344.32

3 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Richmond Gear 6901771 is a high-performance ring and pinion gear set engineered for Ford 9-inch rear axles. This gear set features a 3.89:1 ratio, making it an excellent choice for street performance applications where you need improved acceleration without sacrificing highway drivability.

Key Features:

  • 3.89:1 gear ratio optimized for street performance
  • Designed specifically for Ford 9-inch rear differentials
  • Fits 1967-1976 Ford applications with 10-bolt differential cover
  • Manufactured from high-quality alloy steel for durability
  • Precision-machined gear teeth for quiet operation and long service life
  • Heat-treated for maximum strength and wear resistance

Richmond Gear is known for producing professional-grade drivetrain components that deliver reliable performance for street rods, muscle cars, and performance trucks. This ring and pinion set includes both the ring gear and pinion gear, though installation requires additional components such as bearings, shims, and seals (sold separately). Professional installation and proper setup are recommended to ensure correct gear pattern and backlash.

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

3.89:1

Ring Gear Bolts

10

Ring Gear Diameter (in)

9.000 in.

Ring Gear Rotation

Standard

Ring Gear Teeth

35

Tool

Transmission Lookup

Ring Gear Tooth Quantity

35

Pinion Gear Tooth Quantity

9

Cover Bolt Quantity

Dropout

Pinion Shaft Diameter

1.313

Ring Gear Diameter

9

Ring Gear Material

8620 Steel

Ring Gear Bolt Quantity

10

Ring and Pinion Gear Ratio

3.89

Differential Case Design Type

Ford 9

Position

Rear

Prop 65

WARNING: Cancer - www.p65warnings.ca.gov

Great prices fast and easy

Tried to get this product through others with no luck. This was easy and quick to order.Thanks.

Easy to order. I hope the part fits.

Seller had the best price online for the item I wanted! Responded to emails within 24 hours as stated, and sent me my tracking info as soon as part shipped. Thanks Autoplicity!

Hurry

Fast Shipping and best price around!Will buy thier again order#7585

Shopping was easy and checkout was simple with the Amazon Checkout. Wish I would have know that the tail light was not just a lens but a harness and bulbs.

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