Product Summary

Rear Position, 64.5" Overall Width, 31 Axle Splines

  • Direct fit 9-inch Ford axle housing with stock C10 housing flange for your square body Chevy truck
  • Pre-welded shock mounts and "flipped" leaf spring pads for a 4-6 inch rear drop
  • Includes 31 spline performance axle package with new bearings, seals, retainers, and T-bolts
  • Retains factory GM 5 on 5 wheel bolt pattern with 1/2-20 thread wheel studs
  • Simply add your choice of stock drum or aftermarket disc brakes and 3rd member to complete your 9-inch axle swap

Comes as a Kit

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Key Specs

PositionRear
Overall Width64.5"
Axle Splines31
Axle TypeSemi-Floating
Brakes IncludedNo
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Speedway Motors 99073873 Details

  • Direct replacement Ford 9-inch rear end housing for your GM 1/2-ton truck rear
  • Pre-welded “flipped” mounting pads to place leaf springs under axle tubes for lowering
  • Uses factory staggered shock mounting location to retain stock shock length
  • 9-inch housing features stock GM axle width flange to flange for perfect fit
  • Standard GM C10 axle flange accepts factory drum or aftermarket disc brakes
  • Works with any Ford 9-inch rear end center section (sold separately)
  • New 31 spline axles come with bearings, lock rings, axle seals, and wheel studs installed
  • Axles feature 5x5 GM 1/2 ton truck bolt pattern with 1/2-20 threaded studs

A Direct-Fit Ford 9-inch Rear End Housing to Start Your Square Body C10 Build

There is certainly no denying the popularity of Ford’s venerable 9-inch rear axle when it comes to high performance street and racing applications. It’s probably a safe bet there are more non-Ford vehicles on the road (and track) with a Ford 9-inch rear end under the rear of them than Ford ever shipped off their assembly lines! That is saying a lot right there. From the stronger housing design to the huge aftermarket support in axles, differentials, ring and pinion gears, and more, the Ford 9-inch rear end is the performance axle housing to use, without a doubt.

For those building up the 1973-1987 C10 pickup, known to many by the “square body Chevy” moniker, Speedway Motors offers a bolt-in 9-inch Ford rear end housing for your build that is a direct swap for the stock Chevy truck rear end. This housing is made from premium steel and is fully welded yet keeps the stock GM C10 axle housing ends, allowing you to use stock drum brakes or aftermarket disc options. The housing also maintains the 73-87 C10 rear end width for the 3rd generation Chevy pickup and retains the stock shock mount locations.

The axle’s leaf spring mounting pads have been relocated to the bottom of the axle tubes, which in turn places the axle housing above the leaf spring pack for a rear suspension drop of 4-6 inches. Perfect for leveling out your C10’s ride height. Due to the drop this axle provides you’ll need to either use shock extenders to reuse your stock length shocks or use a shorter rear shock. We do offer our stock C10 flanged 9-inch Ford rear end housing with stock leaf spring pad location as well if you’re planning your drop via springs/shackles.

Includes Fully Assembled Axles Ready for Your Differential and Center Section

Our 9-inch Ford rear end housing package includes strong 31-spline performance axles with bearings and bearing lock rings already pressed into place on the axles. The axles feature the standard 1/2-ton truck 5 on 5 bolt pattern with 1/2-20 press-in threaded studs pre-installed as well. Finally, we include the axle retainer brackets and the correct 9-inch T-bolts and nuts to secure the axles and your original drum brake backing plates or disc brake kit of choice.

Additional hardware includes 10 press-in studs with nylon locking nuts for the main housing to center section assembly, and a screw in axle vent fitting that accepts a 5/16-inch hose. All your new 9-inch housing needs for completion is a complete center section with your choice of differential and gearing with your stock drum brakes or upgrade to our weld-on disc brake package. Our complete 9-inch 3rd members are the perfect choice to finish your 9-inch build to replace your tired Chevy truck rear end with our Ford 9-inch rear end in your square body Chevy while maintaining the stock 73-87 C10 rear end width.

Speedway Motors 99073873 Specifications

KEY SPECS
MFG. Part #99073873
BrandSpeedway Motors
PositionRear
Overall Width64.5"
Axle Splines31
Axle TypeSemi-Floating
Brakes IncludedNo
Wheel Studs IncludedYes
Wheel Bolt Pattern (in.)5x5 in.
Material TypeSteel
FinishNatural
Differential TypeLimited Slip
Tube O.D.3"
Housing MaterialSteel
Hardware IncludedYes
Rotors IncludedNo
Rotor DiameterNot Included
Bolt Pattern5 on 5"
Shaft Diameter1.3125"
GENERAL
Sold in QuantityKit
Axle Shafts IncludedYes
Third Member IncludedNo
Ring and Pinion IncludedNo
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
Shaft Length32.25"

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Great deal

5.0

a year ago

Zach

Houston

Verified

Rear bolted in as advertised. Was missing t bolts and housing bolts so called and they had replacement bolts at my door within a day or two. Great deal and service!

Would Recommend

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