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post #1 of (permalink) Old 11-28-2002, 08:51 PM
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Jeeps rear axle width?

I need a narrow rear end, around 55 inches axle face to axle face. I can't use an off set differential.
I have been told some Jeeps have narrow rear ends. I was directed to Postal Jeeps for this.

As I start searching junk yards,
What jeep products should I look for with rear end around 55 inches?
What year?
What type of bolt patterns will I find?
What type of gear ratio should I expect to fine?
Are there many posit-track rear ends out there?

Are the gear ratios stamped on the frame tag or on the rear end tag? Where can I go to see a code listing?

Thank you for any guidance you can give

Tim Lynch
Comfort, Texas
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post #2 of (permalink) Old 11-29-2002, 09:34 AM
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Re: Jeeps rear axle width?


Some info that you might be able to use. CJs from @ '73-'75 have a Dana 44 with a centered diff. I have one out of a '73 that measures 51" wheel mounting surface to WMS. Ratios were 3.73 or 4.27. This axle is considered to be pretty stout, good housing strength, good 1 piece flanged axles. CJs from @ '77-'79 use a corporate model 20 axle with a centered diff, ratios were 3.54 or 4.09 commonly. Again @ 51" WMS to WMS. The model 20 has a larger ring gear than the 44 but the housing is not considered to be as stout and it has 2 piece axle shafts that many people replace with 1 piece flanged axles to improve strength and reliability. The following letter codes pertain specifically to the model 20 and may or may not be accurate for the 44.

N = trak-lok diff with 3.54 gears
M = trak-lok diff with 4.09 gears
A = open diff 3.54 gears
L = open diff 4.09 gears

A trak-lok diff is a clutch type limited slip diff. Bolt patterns are 5 on 5 1/2 for the CJ axles. I may be off by a year on the model years but it'll get you in the ballpark. I think in '80 ('80-'86) CJs went to a "widetrack" axle that is about 6" wider. If you need more info post on the short wheelbase forum and the folks there will give you tons of info about Cj axles.

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post #3 of (permalink) Old 11-29-2002, 11:05 AM
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Re: Jeeps rear axle width?

You of course need this rear for a jeep, right? If you try to put it in anything other than a jeep, the jeep gods will be upset and place a curse on you. [img]images/graemlins/grin.gif[/img]
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post #4 of (permalink) Old 11-29-2002, 09:14 PM
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Re: Jeeps rear axle width?

Have you asked this in the JEEP forums here on ORC, where the JEEP owners tend to congregate?
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