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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?

Tim-

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.

Jeff
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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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