Product Summary

Universal Fit, Rear Position, 56" Overall Width, Gray

  • 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

Comes as a Kit

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Key Specs

MFG. Part #91604095
PositionRear
Overall Width56"
Axle Splines31
Axle TypeSemi-Floating
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Speedway Motors 91604095 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 910-05959 and 545-46190
  • 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; How to Measure and ID Differential Housings and The Rearend Debate: Ford vs. Chevy.

Speedway Motors 91604095 Specifications

KEY SPECS
MFG. Part #91604095
BrandSpeedway Motors
PositionRear
Overall Width56"
Axle Splines31
Axle TypeSemi-Floating
Brakes IncludedNo
Wheel Studs IncludedNo
Wheel Bolt Pattern (in.)5x4.5 in. | 5x4.75 in. | 5x5 in.
Material TypeSteel
FinishNatural
Differential TypeLimited Slip
Tube O.D.3"
Housing MaterialSteel
Hardware IncludedYes
Rotors IncludedNo
Rotor DiameterNot Included
Bolt Pattern5x4.5 | 5x4.75 | 5x5
GENERAL
Sold in QuantityKit
Axle Shafts IncludedYes
Third Member IncludedNo
Ring and Pinion IncludedYes
Wheel Stud Thread Size1/2"-20
Bearings IncludedYes
Seals IncludedYes
Differential IncludedNo
Ring Gear Size9 Inch
Housing ColorGray
Cut to FitNo
Standard Pinion LocationOffset Pinion / Centered 3rd Member

Ratings & Reviews

5

4 Reviews

Overall Assessment

Customers highly recommend this product, consistently praising its exceptional quality. They noted its practicality specifically for use in vintage vehicles like a 1949 International KB1. Customers were particularly impressed with the superior material quality, underscoring its superiority in comparison to competitors. The product's usability and safety were also consistently lauded.

5

4 reviews

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worx 4 me

5.0

a year ago

marxpups

lynnwood ,wa

Verified

i would buy again

Would Recommend

good buy

5.0

2 years ago

Cap

Summerfield, FL

good part

Would Recommend

I would buy this product again

5.0

4 years ago

Jason

St. Louis Missouri

Verified

I am using this product in a 1949 international KB1

excellent products i would purchase again

5.0

4 years ago

eddie

mt eden kentucky

Verified

these parts are of the highest quality

Would Recommend

Showing 4 of 4 reviews

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