Our fabricated steel Ford 9 inch axle housing kit includes two axles designed for maximum durability, The housing is pumpkin-centered with uniform-length axle tubes side-to-side, so mounting suspension brackets is much easier, Heavy-wall tubes, along with a larger center section, significantly reduce distortion during welding of rear-link brackets or spring pads, These improved axle housings deserve equally strong axles to drive your street machine. Two axles made of alloy steel have the strength to handle the horsepower, Axles are 31-spline, includes axle bearings, axle seals, and bearing retainers
Speedway Ford 9 Inch Rear End Housing Kit with Axles, 56 Inch Speedway Motors
Speedway Ford 9 Inch Rear End Housing Kit with Axles, 56 Inch
Sku # 91604095
Mfr. Part # 91604095
Condition
New
Brand
Speedway Motors
Sold
Kit
Details

Looking for a budget-friendly, rock-solid foundation for your custom rear suspension? Look no further. Our fabricated steel Ford 9 inch axle housing kit including two axles for maximum durability.

Fabricated with the Builder in Mind

This housing is pumpkin-centered with uniform-length axle tubes, side-to-side. So mounting suspension brackets, especially on triangulated 3-link and 4-link systems, is much easier. Note that the pumpkin-centered design will offset the pinion yoke about 1" to the passenger side.

Axle tubes are 3” O.D. with a 3/16” wall thickness. Heavy-wall tubes, along with a larger center section, significantly reduce distortion during welding of rear-link brackets or spring pads. Billet steel “New Big Ford” (Torino) style bearing ends are fixture-welded (3.150” O.D. bearing, with 2.50” axle flange offset).

Total wheel-to-wheel mounting surface width is 56" (from hub-to-hub). The pumpkin is centered in the housing, which puts the pinion 1" offset from center, requiring different length axle shafts. This 56" rear end housing kit includes two 31 Spline 29.5" cut-to-fit axles The housing includes (8) T-bolts for the axle bearing retainer plates and (10) studs for the third member.

Steel Axles

Our axle housings deserve strong axles to drive your street machine. Two axles made of alloy steel have the strength to handle the horsepower. Axles are 31-spline, includes axle bearings, axle seals, and bearing retainers. Flanges are drilled for both 5 on 4-1/2" Ford/Mopar, 5 on 4-3/4" GM, 5 on 5" GM Truck wheel bolt patterns. 

  • New fabricated steel center section
  • 3" O.D. axle tubes with 3/16" wall thickness
  • Billet steel "New Big Ford" (Torino) style bearing ends
  • Forged Steel axle, drilled for 5 on 4-1/2" Ford/Mopar, 5 on 4-3/4" GM car, and 5 on 5" GM Truck Bolt patterns using 0.685" knurl diameter
  • Street application 1/2" thread wheel studs sold separately 
  • Accepts brake kits for 2.50" axle shaft flange offset (from housing flange)
  • Housing measures 51" from flange-to-flange
  • Assembled rearend measures 56" from hub-to-hub (axle flange face-to-face)
  • Includes two 31 spline 29.5" Axles Cut-to-fit with bearings
  • Centered pumpkin w/ 1" offset pinion yoke for easy suspension mock-up
  • Requires different length axle shafts, left/right
  • Includes vent on driver side axle tube
  • Includes studs for 3rd member and 3/8” T-bolts for bearing retainer plates
  • 3rd member sold separately

For more information on determining the proper axle length and the Ford 9 Inch, be sure to check out our tech articles; Measure and ID Axles and Housings and  Specs

Sold in Quantity
Kit
MFG. Part #
91604095
Position
Rear
Overall Width
56.00"
Axle Shafts Included
Yes
Axle Splines
31
Axle Type
Semi-Floating
Brakes Included
No
Third Member Included
Yes
Ring and Pinion Included
Yes
Wheel Studs Included
No
Wheel Stud Thread Size
1/2"-20
Wheel Bolt Pattern (in.)
5x4.5 in. | 5x4.75 in. | 5x5 in.
Bearings Included
Yes
Seals Included
Yes
Differential Included
No
Material Type
Steel
Finish
Natural
Ring Gear Size
9 Inch
Differential Type
Limited Slip
Tube O.D.
3"
Housing Material
Steel
Hardware Included
Yes
Rotors Included
No
Rotor Diameter
Not Included
Housing Color
Gray
Cut to Fit
No
Standard Pinion Location
Offset Pinion / Centered 3rd Member
Bolt Pattern
5x4.5 | 5x4.75 | 5x5
Reviews

worx 4 me

Rated
Product Rating
by marxpups on February 17, 2025

Summary: i would buy again

Yes, I recommend this product.

good buy

Rated
Product Rating
by Cap on January 09, 2024

Summary: good part

Yes, I recommend this product.

I would buy this product again

Rated
Product Rating
by Jason on March 10, 2022

Summary: I am using this product in a 1949 international KB1

excellent products i would purchase again

Rated
Product Rating
by eddie on January 27, 2022

Summary: these parts are of the highest quality

Yes, I recommend this product.

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About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 74 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.