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Unread 08-21-2013, 08:26 AM   #1
mwoods1
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1983 CJ7 
 
Join Date: Aug 2013
Location: hills, m
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Build CJ7 to Last

I have an 83 cj7 with 304 and 4 speed.
Rear axel leaking badly and it does not look stock.
I was thinking it would be best to replace the axels.
Anyone have recommendations?

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Unread 08-21-2013, 09:26 AM   #2
MoC
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Replace the axles since there is a seal leaking?

Post pictures of the axles and someone can id them for you.

or look at the chart below. Stock is a AMC 20 rear and Dana 30 front
axlechart.jpg

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Unread 08-22-2013, 04:23 PM   #3
mwoods1
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Thanks for the chart. Here is photo. Looks like GM 10 bolt. Someone told me hard to fix because its all pressed together and easier to replace the rear end?

I do want to put a crate motor in the future. The jeep is very clean with no rust anywhere.
rear-end.jpg

rear-end1.jpg

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Unread 08-22-2013, 04:25 PM   #4
04KJlimited
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that's a model 20
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Unread 08-22-2013, 06:19 PM   #5
jeepwhore
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1984 CJ7 
 
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Quote:
Originally Posted by mwoods1
Thanks for the chart. Here is photo. Looks like GM 10 bolt. Someone told me hard to fix because its all pressed together and easier to replace the rear end?

I do want to put a crate motor in the future. The jeep is very clean with no rust anywhere.
A gm 10 bolt with 12 bolts and a M20 diff cover?

As mentioned its a 20. The housing looks pretty wet, is it leaking from where the tubes are pressed into the center section?
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Unread 08-22-2013, 07:19 PM   #6
keith460
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1984 CJ7 
 
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Quote:
Originally Posted by mwoods1 View Post
The jeep is very clean with no rust anywhere.
There's rust on the axle and leaf springs, you better sell it while you can.
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Restoration Thread:http://www.jeepsunlimited.com/forums...d.php?t=434226
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Unread 08-22-2013, 07:22 PM   #7
schaef89
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Looks more like your brake line junction is loose or leaking. Maybe the bolt is loose that holds it to the tube. It is a threaded through hole and could be spewing gear oil
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Unread 08-22-2013, 08:39 PM   #8
BagusJeep
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Someone has already modded your CJ by putting in the V8 but that is the original axle. It is capable of handling the 304 and larger engines to an extent but the AMC20 struggles with larger tyres.

The strength of the AMC20 is oft debated here as the axle shaft to hub connection is a splined one and can fail, as many of us have experienced, along with the tubes spinning sometimes under high torque. However with a single piece axle kit and welding of the tubes the AMC20 is used by many members with SBC V8s.

You may want to open up the diff cover and have a look at the internal condition and gear ratios before deciding. If the teeth are badly worn or chipped or the ratio will be wrong for your plans it may be a good time to find axles that will work with your plans rather than rebuild the ones you have. However there is nothing there to suggest you need to immediately replace them.

If you look long and hard you may find rebuilt axles with lockers and ratios suited to your plans for a reasonable price.
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