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Richmond Gear 4901011 Ring and Pinion Set 3.55:1 Ratio Ford 8.0 Inch

(Ford Mustang 1964-73, Maverick 1970-77, Fairlane 1962-70, Ranchero 1964-78, Torino 1968-74, Mustang II 1974-78, Pinto 1971-80, Falcon 1964-70 + 10 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

4901011
9 reviews
Sale Price

$377.88

1 left at this price

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Usually delivered within 2 days

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Product Details

The Richmond Gear 4901011 is a high-performance ring and pinion set engineered for Ford 8.0-inch differentials with a 3.55:1 gear ratio. This precision-manufactured gear set features 32 ring gear teeth and 9 pinion gear teeth, with a 25-spline pinion and 10 ring gear bolts.

Manufactured from first-run steel—never recycled material—these gears are computer-controlled manufactured from the foundry through cutting at 1/1000th of an inch precision to heat-treating the finished product. For over 80 years, Richmond's Double Diamond has signified the highest quality gears in the racing industry.

Key Specifications:

  • Gear Ratio: 3.55:1
  • Differential Type: Ford 8.0-inch
  • Ring Gear: 8.000-inch diameter, 32 teeth
  • Pinion Gear: 9 teeth, 25-spline count
  • Pinion Shaft Diameter: 1.188 inches
  • Ring Gear Bolts: 10 required

The superior quality of Richmond gear sets is the result of years of racing development, outstanding design, and state-of-the-art manufacturing methods. Engineered to perform faster and more reliably, Richmond products are winners at both the Daytona 500 and U.S. Nationals. Richmond backs its ring and pinion gear sets with a 2-year/100,000-mile warranty.

Important Installation Note: This gear set does not include installation components such as bearings, seals, shims, crush sleeve, pinion nut, or ring gear bolts—these must be purchased separately. Professional installation and proper setup with a dial indicator is recommended to ensure optimal gear contact pattern and longevity.

Products specifications

Fits

Ford Mustang 1964-73, Maverick 1970-77, Fairlane 1962-70, Ranchero 1964-78, Torino 1968-74, Mustang II 1974-78, Pinto 1971-80, Falcon 1964-70, Gran Torino 1972-74, LTD 1965-78, Fairmont 1978-79, Granada 1975-80 + 6 more models

Calculator

Gear Ratio Calculator

Cover Bolts

10

Installation Kit Included

No

Pinion Gear Teeth

11

Pinion Shaft Diameter (in)

1.188 in.

Pinion Spline Count

25

Quantity

Sold as a set.

Ring and Pinion Ratio

3.55:1

Ring Gear Bolts

10

Ring Gear Diameter (in)

8.000 in.

Ring Gear Rotation

Standard

Ring Gear Teeth

39

Tool

Transmission Lookup

Pinion Gear Tooth Quantity

9

Ring Gear Diameter

8

Ring Gear Bolt Quantity

10

Ring Gear Material

8620 Steel

Ring Gear Tooth Quantity

32

Ring and Pinion Gear Ratio

3.55

Pinion Shaft Diameter

1.188

Differential Case Design Type

Ford 8

Cover Bolt Quantity

Dropout

Position

Rear

Prop 65

WARNING: Cancer - www.p65warnings.ca.gov

Best prices, fast shipping, good service. Thank you!

I was still L@@KING for 'options'--didn't expect it to go thru so fast!! THANKS, great job.

Great prices and shipped promptly.

Great Price and questions were answered by a real person on the phone, who had specific knowledge of this product, unlike a local dealer! Thanks!

Seller is fast, selection is great, website is well organized. Prices are some of the best online and very competitive. Order # 12377 for J. Park

BEST PRICE AROUND, HANDS DOWN. Shipping was fast and communication was impeccable. THANKS FOR THE PROFESSIONALISM.

best prices around by far for the exact same product! Would definetely recomend autoplicity to a friend

the product was the cheapest price i could find on the web and shipping was quick i got the part in two days from purchase

Wonderful experience with seller. Ordered on a Monday night and received on Thursday. Talking about service. Man these guys are awesome. I will be ordering more in the future with Autoplicity. Thanks again!

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