Clarification on Axles widths -

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post #1 of 8 Old 02-01-2010, 10:35 AM Thread Starter
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Clarification on Axles widths

I have a question I can never really seem to find a good clear answer for...axles widths. Sounds like axle swapping is pretty common but the whole width thing puzzles me. Are most axles the same width? Does there always need to be custom shortening? I've heard D44 Wide and Narrow trac. What about 8.8" and 9"s? Is there someone that could dumb this down for me or provide some kind of chart? I'm planning an axle swap in the next year or so and want to get my facts straight.

I hope this makes sense.

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post #2 of 8 Old 02-01-2010, 12:31 PM
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there are a LOT of 8.8 and 9s. A LOT. Are all going to be slightly different based on model year & vehicle - small bearing, large bearing, different widths, different splines, different carriers, different gears, different brakes, etc. You're best bet is to figure out what width you need and then try to find an axle that matches with a tape measure.

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post #3 of 8 Old 02-01-2010, 12:35 PM
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-->>> Axle width chart


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post #4 of 8 Old 02-01-2010, 01:39 PM Thread Starter
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So I have a D30 in the front and AMC 20 in rear of a 78 CJ5. So theoretically any axle I swap in, I'll want it to be the same width as the stock....
What exactly are the measurement points on the axle?
There are different sizes of D44s as well?
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post #5 of 8 Old 02-02-2010, 03:42 AM
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Hey Drummer,
do a thread search on here, someone had a really good post with the diff year jeep axles and measurements. They are measured from (wms) to (WMS), that is 'wheel mating surface'. that is the point where your wheel mounts up to. Any, hope this helps, like I say, I've seen it on this forum before, so I know it's been posted. You can also google 'axle widths' and should come up with some info that way...

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post #6 of 8 Old 02-02-2010, 10:15 AM Thread Starter
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Thanks for the info.

I found a little info on here too: cjaxleswap
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post #7 of 8 Old 04-08-2013, 04:06 PM
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post #8 of 8 Old 04-09-2013, 05:36 PM
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You have a narrow trac 78 CJ
You can run a narrow trac Dana 44 out of a 72-75 CJ
Comando 72-73

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