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Product Summary

Universal Fit, Rear Position, Semi-Floating Axle Type

  • 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

Key Specs

MFG. Part #91604094
BrandSpeedway Motors
PositionRear
Axle TypeSemi-Floating

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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 54" (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 54" rear end housing kit includes two 29-1/2" long axles 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, 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 49" from flange-to-flange
  • Assembled rearend measures 54" from hub-to-hub (axle flange face-to-face)
  • Includes two 29-1/2" long axles (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

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.

Specifications

KEY SPECS
MFG. Part #91604094
BrandSpeedway Motors
PositionRear
Axle TypeSemi-Floating
GENERAL
Overall Width54"
Differential IncludedNo
Axle Splines31
Tube O.D.3"
Bolt PatternMulti: 5 on 5" | 4.75" | 4.50"
Housing MaterialSteel
Wheel Studs IncludedNo
Hardware IncludedYes
Sold in QuantityKit
Brakes IncludedNo
Bearings IncludedYes
Seals IncludedYes