Product Summary

Universal Fit, Rear Position, 60" 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. Cut to fit axles

Comes as a Kit

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Key Specs

MFG. Part #91604097
PositionRear
Overall Width60"
Axle Splines31
Axle TypeSemi-Floating
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Speedway Motors 91604097 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 60" (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 60" rear end housing kit includes one 33" long axle and one 29-1/2" long axle that are cut to fit. 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 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
  • 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 55" from flange-to-flange
  • Assembled rearend measures 60" from hub-to-hub (axle flange face-to-face)
  • Includes one 33" long axle and one 29-1/2" long axle (axles are cut to fit)
  • 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
  • The axles that come in this kit need to be Cut down to fit. 

  • 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 91604097 Specifications

KEY SPECS
MFG. Part #91604097
BrandSpeedway Motors
PositionRear
Overall Width60"
Axle Splines31
Axle TypeSemi-Floating
Brakes IncludedNo
Wheel Studs IncludedNo
Wheel Bolt Pattern (in.)5x4.5 in. | 5x4.75 in.
Material TypeSteel
FinishNatural
Differential TypeLimited Slip
Tube O.D.3"
Housing MaterialSteel
Hardware IncludedYes
Rotors IncludedNo
Rotor DiameterNot Included
Bolt Pattern5 on 4.5" | 4.75"
GENERAL
Sold in QuantityKit
Axle Shafts IncludedYes
Third Member IncludedYes
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

2.5

2 Reviews

Overall Assessment

The product is lauded for its aesthetic appeal and usefulness, especially in old models like the 1933 Ford Coupe. Users reported that it can handle a big block and looks outstanding when installed. However, some customers stated issues with the flange quality and fit with Wilwood brakes, necessitating alterations. Despite this, many have recommended the product, emphasizing it over competitors. Comparatively, users found it's overall reliable, efficient and cost-effective given its performance and the enhancement it delivers.

2.5

2 reviews

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I would never buy from Speedway again

1.0

4 years ago

Cody

Texas

The flange on the drivers side of the tube is welded on at an angle preventing the Wilwood brakes from lining up properly. Speedway suggests I take it to a machine shop or as the tech line suggested "grind down" the flange to shore it up properly. None of those costs will be incurred by speedway, it's all on myself. I will never spend another penny with Speedway motors and I recommend nobody else do either.

Would Not Recommend

yes i would buy this product again

4.0

5 years ago

Dwight

ga.

Verified

installed in 1933 ford coupe with big block. looks great.

Would Recommend

Showing 2 of 2 reviews

Questions & Answers

1 Question • 1 Answer

Will this be able to accept stock drum brakes

by N

• a year ago

1 answer

1 of 1 questions shown

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