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Author Topic: Factory Axle Widths  (Read 26704 times)
Is1BadFord
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« on: March 27, 2011, 05:45:42 PM »

Hey guys, I was on another forum and this subject came up recently.  They were discussing the interchangeability of axles into various vehicles.  A lot of the 67/68 guys are bolting Exploder axles straight into their cars, offset pumpkin and all lol.  Other guys narrow the Explorer axle 3" and use two short side axles for a quick, narrow 31 spline posi setup.  So, I thought maybe we should pool our knowledge, and get a thread together listing all the factory widths, and what combinations might work together (Explorer short side axles and differential in a fox fox housing, etc?).

So...wheel mounting surface to wheel mounting surface....

*57.25" - 57-59 Ranchero/Station Wagon 9"
*57.25" - 57-64 Ford Full Size 9"
*57.25" - 65/66  Mustang 8" and 9"
*58.50" - 77-81 Granada/Versailles 9" width
*59.25" - 67/68  Mustang 8" and 9" width
*59.25" - 69/70  Mustang 8" and 9" width
*59.25" - 67-71 Comet/Cougar 9" width
*59.25" - 86-93 Mustang 8.8" width - zero offset - 28 spline axles - 29.188" axle length
60.8" - 94-98 Mustang 8.8" width - zero offset - 28 spline axles - 29.969" axle length (Unsure of this width)
*59.50" - 91-94 Explorer 8.8" width - 3.250" tube diameter - 3.875" passenger side offset - 31 spline axles -  30.5" driver side axle length, 27.625" passenger side axle length
*59.50" - 95-01 Explorer 8.8" width
*61.25" - 71-73  Mustang 8" and 9" width
 - 99-04 Mustang 8.8" width - zero offset - 28 spline axles - 30.688" axle length
 - 02-05 Explorer 8.8" width

I don't know if the Explorer widths change through the years, or if some are more suitable for swapping than others.  I do know that the later (96+?) ones come with disc brakes.

If you guys give me more vehicles I'll add them, and if you give me lengths (be sure it's wheel mounting surface to wheel mounting surface), I'll add that too.  If we can fill it up, it'll make a great sticky.

Cris

* Where I sourced the information, click the asterisk to go to the webpage.
« Last Edit: April 26, 2014, 08:03:44 PM by Is1BadFord » Logged
Teddyzee
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« Reply #1 on: March 27, 2011, 07:04:35 PM »

Explorer rearends were the same width from '91-01. They switched to disc brakes in 1995, with large bearing ends and internal drum parking brake.
In 2002 they changed to IRS.

1993 to current Ranger 7.5 and 8.8 rears are the same width, same axles. They are commonly referred to as being 1.5" (total) narrower than the Explorer. The measurement I can find is 58.5" mount flange to mount flange, does not quite match your numbers, but it gives a ballpark for now. I can measure mine in the near future.
1983-1992 Ranger rears are said to be 1.5" narrower then the 1993-current Ranger.

All Ranger and Explorer rears have the center section offset to the passenger side. So all of them can easily be narrowed, using two passenger side axles.

Early Ranger rearends (1983 to 1992) have a driver side axle (the long side) that is the same length as a Fox body axle. That's the cheap way to do a 5 lug swap on a Fox, (two early Ranger driver side axles) but it gives reference to the overall width of the Ranger rear.

All these Ranger rears can be modified for disc brakes the same way you would a Fox.

'94-'98 Mustang has the same width housing as the Fox, but each axle is .75" wider outside of the housing, to fit the disc brake bracket.

'99-'04 Mustang housing grew .75" per side, total width flange to flange being 1.5" greater than the 1998 cars.

I know these are not actual measurements, but may be of use to some of you.
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'97 Ranger 5.0 EFI T5
'97 Mustang GT
Is1BadFord
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« Reply #2 on: March 27, 2011, 07:08:49 PM »

Explorer rearends were the same width from '91-01. They switched to disc brakes in 1995, with large bearing ends and internal drum parking brake.
In 2002 they changed to IRS.

1993 to current Ranger 7.5 and 8.8 rears are the same width, same axles. They are commonly referred to as being 1.5" (total) narrower than the Explorer. The measurement I can find is 58.5" mount flange to mount flange, does not quite match your numbers, but it gives a ballpark for now. I can measure mine in the near future.
1983-1992 Ranger rears are said to be 1.5" narrower then the 1993-current Ranger.

All Ranger and Explorer rears have the center section offset to the passenger side. So all of them can easily be narrowed, using two passenger side axles.

Early Ranger rearends (1983 to 1992) have a driver side axle (the long side) that is the same length as a Fox body axle. That's the cheap way to do a 5 lug swap on a Fox, (two early Ranger driver side axles) but it gives reference to the overall width of the Ranger rear.

All these Ranger rears can be modified for disc brakes the same way you would a Fox.

'94-'98 Mustang has the same width housing as the Fox, but each axle is .75" wider outside of the housing, to fit the disc brake bracket.

'99-'04 Mustang housing grew .75" per side, total width flange to flange being 1.5" greater than the 1998 cars.

I know these are not actual measurements, but may be of use to some of you.

That is great information, thank you very much!

With some calculation I might be able to add some widths in there =D.

Cris
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ammosteve
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« Reply #3 on: March 28, 2011, 05:21:23 AM »

This is coming at the right time....We are looking to replace the 8 inch in the 68 Falcon.  We broke an axle this weekend so an upgrade is in the very near future.

We need to get an accurate measurement on what is in the car.  My guess is it should be the same or close to the 67-68 Mustang.

steve

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Is1BadFord
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« Reply #4 on: March 29, 2011, 08:56:56 PM »

This is coming at the right time....We are looking to replace the 8 inch in the 68 Falcon.  We broke an axle this weekend so an upgrade is in the very near future.

We need to get an accurate measurement on what is in the car.  My guess is it should be the same or close to the 67-68 Mustang.

steve

Good deal man.

Here's a nice site with information on the exploder 8.8.

I also found, if you want the rear end narrowed at all, that the long side tube and short side tube on an Explorer 31 spline 8.8 are exactly 3" different in length.  If you hit a boneyard, and pick up an explorer 8.8, you can narrow it 3" (makes it 56.5" wide wheel mounting surface to wheel mounting surface) if you simply pick up another short side axle from another truck.  The beauty is that the axle tubes are simply held in with a pressed in plug.  Drill the plug out, press the tube out, cut it 3", press it back in, and first weld the plug hold up, then weld the tube up.  Most guys get away with this without a jig if they weld carefully.  I've even heard that there is no issue welding the tube to the cast iron center.  Pretty cool.  56.5" is 1.5" per side narrower.  On my 67, this would barely put the tires in contact with the leafs (275/50/15 M/T DR's on 15"x10.5" Centerlines with 4.5" backspacing).  A .5" spacer would fix the problem, and greatly help my outer fenderwell clearance.  My next set of wheels I'll just order with 3.5"- 4" backspacing (common for Nova's I think).  Either that, or I'll go 4 link and keep the rims I have lol.

I'm thinking this might work on your ride too...

Cris
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Is1BadFord
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« Reply #5 on: March 29, 2011, 08:57:30 PM »

Oh and Doug or Joe...or whoever, can you sticky this?  I think it's got enough good information to warrant it yeah?

Cris
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