Product Summary

Ford 9 Inch, Rear Position, 59.25" Overall Width

  • Direct fit bare steel 9-inch Ford axle housing for your 67-70 Ford Mustang
  • Pre-welded shock mounts and stock location leaf spring pads for stock ride height
  • Includes 31 spline performance axle package with new bearings, seals, retainers, and T-bolts
  • New Big Ford style ends - accepts 2.5" offset brakes
  • Retains factory Ford 5 on 4-1/2 wheel bolt pattern with 1/2-20 thread wheel studs

Comes as a Kit

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Key Specs

MFG. Part #99046770
PositionRear
Overall Width59.25"
Axle Splines31
Axle TypeSemi-Floating
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Need To Know

Quick and Easy Returns

Return Policy

Speedway Motors 99046770 Details

  • Housing length: 54-1/4 inches (from flange-to-flange)
  • Total wheel-to-wheel mounting surface width is 59-1/4 inches (from hub-to-hub)
  • Direct replacement Ford 9-inch housing rear end for your 67-70 Mustang
  • Pre-welded mounting pads retain stock leaf spring mounting location
  • Uses factory shock mounting location to retain stock shock length
  • 9-inch housing features stock 67-70 Mustang rear end width flange to flange for perfect fit
  • Works with any Ford 9-inch housing center section (sold separately)
  • Big Ford new style “Torino” axle flange accepts drum or disc brakes
  • New 31 spline axles come with bearings, lock rings, axle seals, and wheel studs installed
  • Axles feature 5x4.5 Ford and 5x4.75 GM car bolt patterns with 1/2-20 threaded studs

A Direct-Fit Ford 9-inch Rear End Housing for Your First Gen 67-70 Mustang

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 is probably a safe bet there are more non-Ford vehicles on the road (and track) with a Ford 9-inch rear end under 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 a 67-70 Mustang, Speedway Motors offers a bolt-in 9-inch Ford rear end housing for your build that is a direct swap for stock first gen 67-70 Mustang rear ends. This Mustang rear end housing is made from premium steel and is fully welded, including brand new “Torino” big Ford axle housing ends. The housing maintains the 67-70 Mustang rear end width and retains the stock shock mount locations as well. The axle’s leaf spring mounting pads are welded in their stock mounting location for a bolt-in solution. This allows you to retain stock ride height characteristics or you can lower the rear of your Mustang via lowering springs, lowering blocks, or other options.

Includes Fully Assembled Axles Ready for Your Differential and Center Section

Our 67-70 Ford Mustang 9-inch 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 dual Ford/Chevy bolt pattern of 5 on 4-3/4 and of 5 on 4-1/2 with 1/2-20 press-in threaded studs preinstalled in the 5 on 4-1/2 Ford pattern. Finally, we include the axle retainer brackets and the correct 9-inch T-bolts and nuts to secure the axles and your drum or disc brake kit of choice.

Additional hardware includes 10 press-in studs with nylon locking nuts for the main 9-inch housing to center section assembly, and a screw in axle vent fitting. All your new Ford 9-inch housing needs for completion is a complete center section with your choice of differential and gearing and drum or disc brake package. Our complete 9-inch 3rd members are the perfect choice to finish your first gen 67-70 Mustang 9-inch rear end build. Replace your tired 67-70 Ford Mustang rear end with our Ford 9-inch rear end in your 67-70 Mustang while maintaining the stock rear end width and upgrade to the strength and vast options the Ford 9-inch offers.

Specs

  • inside to inside of the brackets is 41"
  • outside to outside on the brackets 45"
  • center to center of the bracket 43"
  • The axle flange to flange width of this rearend setup is the factory width of 59-1/4", the width of the housing itself is 54-1/4".

Speedway Motors 99046770 Specifications

KEY SPECS
MFG. Part #99046770
BrandSpeedway Motors
PositionRear
Overall Width59.25"
Axle Splines31
Axle TypeSemi-Floating
Brakes IncludedNo
Wheel Studs IncludedYes
Wheel Bolt Pattern (in.)5x4.5 in. | 5x4.75 in.
Material TypeSteel
FinishNatural
Tube O.D.3"
Housing MaterialSteel
Hardware IncludedYes
Rotors IncludedNo
Rotor DiameterNot Included
Bolt Pattern5 on 4.5"
GENERAL
Sold in QuantityKit
Notes1/2"-20 wheel studs, 2" long, 0.685" knurled
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 ColorNatural
Cut to FitNo
Standard Pinion LocationCentered Pinion / Offset 3rd Member

Ratings & Reviews

4.7

3 Reviews

Overall Assessment

Customers highly recommend our rear-end housing due to its excellent quality. They appreciate its practicality, noting that it comes with studs, a useful feature that may not be immediately apparent. Users have also mentioned confidence in the product's material quality and its superior usability compared to competitors, confirming that they would not hesitate to repurchase. The safety and reliability of our housing have also been emphasized, further enhancing its unquestionable performance and strong customer satisfaction.

4.7

3 reviews

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Would buy again. Could be better

4.0

a year ago

Kel

Central New York

Verified

Everything about this kit is pretty nice. Welds are nice. Simple upgrade would be a drain plug. Does come with hardware for mounting the 3rd and the hardware/ back plate for the axle ends.

Would Recommend

great quality

5.0

5 years ago

Double

LV

Verified

website suggest to buy the studs for the housing that i bought. The housing came with the studs. It was unclear if the product came with the studs or not and would be helpful to mention this. Maybe i missed this somewhere. The rear-end housing is great and i have no complaints about that.

Would Recommend

I think this rear housing and axles are 5 star.

5.0

6 years ago

Horse fly

Hampton, va.

Verified

I would buy it again if I need to.

Would Recommend

Showing 3 of 3 reviews

Questions & Answers

6 Questions • 6 Answers

What is the width from hub surface to hub surface?

by Tyler

• 2 years ago

1 answer

How much axle offset needed when ordering a disc brake kit?

by Alex

• 6 years ago

1 answer

I have a 1967 mustang with 429. Looking for a 9" axle with pozzi. Does this axle have pozzi? Or is there a part I can add to the axle to engage pozzi?

by Telly

• 8 years ago

1 answer

I have a 1969 Mustang Mach 1, 351 W. Will the stock drum brakes bolt onto this rear end?

by Gary

• 8 years ago

1 answer

Does this come with 5x4.75 or 5x4.5 lug pattern? The info and details sections don't match.

by Everett

• 8 years ago

1 answer

With overdriveWhat third member and gear ratio is recommended for my car? I have a 67 mustang that now has a ford 306 cubic inch., fuel injected with a 5 speed manua

by Doug

• 8 years ago

1 answer

6 of 6 questions shown

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