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 79-0079-1 Pro Gear Ring and Pinion 4.29 Ratio Ford 9 Inch 35 Spline

(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 + 22 more models)

Part of: Richmond Gear PRO Gear Differential Ring and Pinion Sets

Other options in this family: Richmond Gear 7900171 Richmond Gear 7900801 Richmond Gear 7900431 Richmond Gear 7900451 Richmond Gear 79-0002-1

Manufacturer

Picture for manufacturer Richmond Gear

Part Number

7900791
4 reviews
Sale Price

$723.16

In Stock (6)

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 79-0079-1 Pro Gear is a high-performance ring and pinion set engineered specifically for Ford 9-inch differentials with a 4.29:1 gear ratio. Designed for race-only applications where hard launches and severe heat cycling occurs, these gear sets are constructed from a softer, more malleable 9310 steel alloy to resist breakage under harsh racing conditions.

Key Specifications:

  • 4.29:1 gear ratio with 30 ring gear teeth and 7 pinion teeth
  • 35-spline big pinion with 1.875-inch pinion shaft diameter for enhanced load capacity and stability
  • Dual-drilled for both 1/2-inch and 7/16-inch ring gear bolts for versatile fitment
  • Premium 9310 steel construction for long-lasting performance and strength
  • Ground pinion threads for trouble-free installation
  • Up to 6 pounds of rotating weight reduction

This gear set is backed by a 2-year or 100,000-mile warranty, offering reliability and peace of mind for demanding racing applications. Note: Special 35-spline pinion support required (not included with gear set).

Richmond Gear Pro Gear sets feature the legendary Double Diamond quality that has been proven at the highest levels of motorsports competition. These gears deliver the strength and precision needed for high-horsepower drag racing and extreme performance applications.

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 + 17 more models

Calculator

Gear Ratio Calculator

Cover Bolts

10

Installation Kit Included

No

Notes

Requires special pinion support not included.

Pinion Gear Teeth

7

Pinion Shaft Diameter (in)

1.513 in.

Pinion Spline Count

35

Quantity

Sold as a set.

Ring and Pinion Ratio

4.29:1

Ring Gear Bolts

10

Ring Gear Diameter (in)

9.000 in.

Ring Gear Rotation

Standard

Ring Gear Teeth

30

Tool

Transmission Lookup

Ring Gear Bolt Quantity

10

Ring Gear Tooth Quantity

30

Ring Gear Material

9310 Steel

Cover Bolt Quantity

Dropout

Differential Case Design Type

Ford 9

Pinion Shaft Diameter

1.875

Ring and Pinion Gear Ratio

4.29

Ring Gear Diameter

9

Pinion Gear Tooth Quantity

7

Prop 65

WARNING: Cancer - www.p65warnings.ca.gov

Position

Rear

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!

Great price, good e-mail communication and fast shipping. Positive experience with Autoplicity so far.

Ordered a Trac-Bar from Autoplicity, and didn't have any problems. WILL be back!

Product (Dee-Zee nerf bars) was exactly as advertised. Buying experience was great. I did contact customer service via email to find out the shipping information. They were very helpful and replied within a few hours.

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