9 Inch Ford Cut-to-Fit Axle with Bearing, Big Ford/Old Style

#91045131

9 Inch Ford Cut-to-Fit Axle with Bearing, Big Ford/Old Style

Name: 9 Inch Ford Cut-to-Fit Axle with Bearing, Big Ford/Old Style
Brand: Speedway Motors
SKU: 91045131
Rating: 5 (1 reviews)

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9 Inch Old Style Big Ford
28 or 31 spline axle
Long or Short

Spline:

Select a spline

Length:

Select a length

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$167.99

/each

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Product Summary

Semi-Floating Axle Type, 1541H Alloy Steel, Cut to Fit

9 Inch Old Style Big Ford
28 or 31 spline axle
Long or Short
Axle has the old style big bearing ends on it

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Key Specs

MFG. Part #	Select Spline and Length
Brand	Speedway Motors
Axle Type	Semi-Floating
Material Type	1541H Alloy Steel

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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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Details

These steel axle shafts have a natural finish and are sold individually. 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 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
Street application 1/2" thread wheel studs sold separately 910-05959 and 545-46190
9 Inch Ford
28 or 31 spline axle
Long or Short
Axle has the old style big bearing ends on it
Bearing measures 3.150"
Bearings already pressed in
2-3/8" Offset
Drilled for 5 on 4-1/2", 5 on 4-3/4" & 5 on 5" wheel bolt patterns using 0.685" knurl dia.
Axles have 3 patterns 5 on 4 1/2", 4 3/4", and 5"
PA20 set bearing
Axle length is from the flange to the end of the splines
Axles sold each, not as a pair
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.

CA Prop 65

Specifications

KEY SPECS
MFG. Part #	Select Spline and Length to see
Brand	Speedway Motors
Axle Type	Semi-Floating
Material Type	1541H Alloy Steel

GENERAL
Position	Rear
Wheel Studs Included	No
Finish	Natural
Sold in Quantity	Each
Offset	2.36"
Stud Diameter	0.68"
Notes	Wheel studs not included. Sold separately. See suggested sku #s below.
Cut to Fit	Yes

Ratings & Reviews

1 Review

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Installation heads up

5.0

11 months ago

Auburn Sam

Cedarburg, WI

Verified

Axle seems to be well built. I had an issue with installation that you need to be aware of. My axle just wouldn't fit properly. Ends up you need to remove the old axle seal, it looks as if it is part of the steel housing so I did not notice it. The new axle has an upgraded design and the new seal is built into the bearing, therefore the old seal MUST be removed. Once I figured this out, everything fit fine. I wish they had instructions that showed this. I did call for technical assistance and they did not suggest this as a solution.

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