Ford 9 Inch Cut-to-Fit Axles w/ Big Bearing | 28-31 Spline, Pair

#91605146

Ford 9 Inch Cut-to-Fit Axles w/ Big Bearing | 28-31 Spline, Pair

Name: Ford 9 Inch Cut-to-Fit Axles w/ Big Bearing | 28-31 Spline, Pair
Brand: Speedway Motors
SKU: 91605146
Price: 358.99 USD
Availability: InStock
Rating: 4.8 (28 reviews)

28 Reviews

3 Questions

These steel axle ford 9 inch shafts have a natural finish and are sold as a pair
Perfect for small shops and allow for a custom width rear end to be built easily
Choose 28 or 31 spline axles in long or short lengths for Ford 9 inch 3rd members

$358.99

/pair

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$365.98

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Product Summary

Ford 9 Inch, Semi-Floating Axle Type, 1541H Alloy Steel

These steel axle ford 9 inch shafts have a natural finish and are sold as a pair
Perfect for small shops and allow for a custom width rear end to be built easily
Choose 28 or 31 spline axles in long or short lengths for Ford 9 inch 3rd members
Ford 9 inch Cut to Length Axles include new style big bearing ends with bearings already pressed in
Ford 9 Cut-to-Fit Axles have 3 bolt patterns in them: 5 on 4-1/2", 5 on 4-3/4" and 5 on 5"

Comes as a Kit

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Key Specs

MFG. Part #	91605146
Brand	Speedway Motors
Axle Type	Semi-Floating
Material Type	1541H Alloy Steel

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Need To Know

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Installation Details

Installation Tips

Long:
- 33" length with 9-1/4" of spline
Short:
- 29.51" length with 8" of spline

Installation Notes:

Disc brake kits may require increasing the i/d of the center hole in the rotor to match the o/d register or hub pilot on the axle flange, or reducing the diameter of the register or hub pilot on the axle to fit properly to the i/d of the rotor.

When installing new axles in rearends with posi traction differentials, be sure to install the driver's side axle first to keep the splines properly aligned. Failure to do so may move the two splined gears out of alignment, and it may be difficult to install the driver's side axle properly if the passenger side axle is already installed.

If installation of passenger side axle is done first it may require two people when installing the driver's side axle, with both parties rotating reach axle until splines are in line and the driver's side axle fully sides into the housing.

When cutting axles to desired lengths, it is recommended that the following procedures are performed:

Normal steel cutting machinery (cold saw, band saw, chop saw, etc.)
Using a sleeve around the axle such as a small piece of PVC tubing - this allows:
- The axle to be spun in place while being cut
- A perimeter cut around the outer diameter assisting in keeping the cut square
- Avoiding the build-up of too much heat by doing a straight cut (like a knife though a stick of butter)

To ensure you get the most out of your new 9 Inch components, it is recommended that you perform a proper break-in process:

Use a name brand mineral-based gear oil, preferably 85w140 (Extremely high quality synthetic oils may be used once break-in process has been successfully performed)
Place vehicle on jack stands and let the rearend spin while the vehicle idles - run transmission in both forward and reverse periodically throughout the process
Continue to run the rearend until the pinion gets hot (place hand on bottom of the differential housing to verify this)
Proper break-in allows:
- The ability to install new axles and hit the track the same day without worry
- Extended life for rearend components
- Keeps the quality and life of your gear oil

Also available for consideration when a replacement axle bearing retainer for either of the following Ford applications may be required:

Big Ford Old Style Axle Housing Bearing Retainer Application # 910-48376
Big Ford New Style Axle Housing Bearing Retainer Application # 910-48379

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Speedway Motors 91605146 Details

These steel axle shafts have a natural finish and are sold as a pair. They are perfect for small shops and will allow you to build your own custom width rear end easily. Axle length is measured from the flange to the end of the splines. Be sure to select your choice of length; short or long, and either 28 or 31 spline.

Circle track / off road application 5/8" thread wheel studs sold separately 910-05957 and 910-05958-5
Street application 7/16" and 1/2" thread wheel studs sold separately
1/2" Thread studs 910-05959 and 545-46190 and 7/16" thread studs 910-05955 are available separately
9 Inch Ford
28 or 31 spline axle
Short and long cut to fit axle shafts
Axle has the new style big bearing ends on it
Bearing measures 3.150"
Bearings already pressed in
2-1/2" Offset
Drilled for 5 on 4-1/2", 5 on 4-3/4" and 5 on 5" wheel bolt patterns using 0.685" knurl dia.
Includes PA20 set bearing
Includes 1 pair of Big Ford axle bearing retainer plates, AR375 Torino style
Axle length is from the flange to the end of the splines
Axles sold as a pair with your choice of spline count and length
The hub pilot (center of the axle flange) measures 2.781"
The O.D. of the axle flange measures 5.93"

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 91605146 Specifications

KEY SPECS
MFG. Part #	91605146
Brand	Speedway Motors
Axle Type	Semi-Floating
Material Type	1541H Alloy Steel

GENERAL
Position	Rear
Bolt Pattern	Dual: 5 on 4.5" \| 4.75"
Housing End Style	Big Ford/New Style (Torino)
Wheel Studs Included	No
Finish	Natural
Sold in Quantity	Pair
Knurl Diameter	0.685"
Notes	Wheel studs not included. Sold separately. See suggested sku #s below.
Cut to Fit	Yes

Ratings & Reviews

4.8

28 Reviews

Overall Assessment

Customers commend the axles for their exceptional quality, affordability, and functionality, deeming them a great value. Ease of customization is a selling point, with these axles being easy to cut to length and install. They are a good fit for a range of vehicles, including the Speedway motors fabricated 56" ford 9 inch. The pre-installed bearings simplify installation and enhance value. Users particularly praise the product's contribution to vehicle performance, especially in 'Hotrod builds' for its muscle. The axles outshine competitors with their material quality, practicality, and durability.

Write A Review

4.8

28 reviews

Most Liked Positive Review

5.0

Perfect for slightly narrowed 9 inch

Perfect match (once cut down) to my Speedway motors fabricated 56" ford 9 inch. 31 spline with pre-installed bearings not only saved me time, but the price is hard to beat ! Cut down nicely with chop saw and beveled the splines a touch to help engage nicely into the 3rd member.

Most Liked Negative Review

1.0

Will never buy from speedway again

Got left stranded twice by these, each side went out on different occasions

Filter by Ratings

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Easy installation

5.0

9 months ago

35 Ford

Denver, NC

Verified

These were easy to install and were a great value.

Would Recommend

Great product for the value

5.0

9 months ago

35 Ford

Denver, NC

Verified

Fit perfect. Was easy to install.

Would Recommend

I would buy them again

4.0

a year ago

Hank

Cascade ia

Verified

Easy to us

Good axles for the money

5.0

a year ago

Greg

Milwaukee

Verified

Worked great for my nova project with the ford 9". Take good measurements!

Would Recommend

Great product

4.0

a year ago

Bob

Chesapeake VA.

Verified

Easy to make work on narrowed housing

Would Recommend

Good axles

5.0

a year ago

Sam

Kansas

Verified

Easy to cut

Would Recommend

Cut to fit axles

5.0

2 years ago

Eyal

Verified

Good quality product.

Would Recommend

I would buy this product again

5.0

2 years ago

Ex. Eddie

Ex. Tucson Arizona

Verified

I bought Cut to fit axles to fit my Ford 1929 coupe it has a Ford 9 bolt shorten rear end.

Would Recommend

Will never buy from speedway again

1.0

2 years ago

Got left stranded twice by these, each side went out on different occasions

Would Not Recommend

They fit and seem decent

5.0

2 years ago

Ogre

Alabama

Haven't really used them yet but install was easy enough. Nice to have the option to make my rear bolt pattern match the front.

Would Recommend

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Questions & Answers

3 Questions • 3 Answers

Sort Questions

On the Short axles what's the total length of splines, I have 24 3/4 right short and 22 1/8 Left side. Stock street studs are the press on, I'm running 4 3/4 Chevy. Thanks 👍

by Eddie

• 2 years ago

1 answer

View Answer

Do you know the flange and hub sizes? And 7/16 studs for 5 on 4-3/4 bolt pattern ?

by Andy

• 4 years ago

1 answer

View Answer

Are the bearings in this set tapered or sealed ball bearings?

by Steve

• 4 years ago

1 answer

View Answer

3 of 3 questions shown

Fitment

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