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post #1 of (permalink) Old 08-23-2000, 02:12 PM
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amc 20 on a yj?

I went to a junk yard and saw what seems to be a yj but was a little different...it had a stock yj length amc 20 in the rear. Is this some sorta swap or did it come stock with the yj? would it be worth it to switch that into the back of my yj? I think the bolt pattern is the same but not to sure.

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post #2 of (permalink) Old 08-23-2000, 02:19 PM
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Re: amc 20 on a yj?

YJs never came with the 20s, in fact AMC didn't even use it in most 86 CJs, they had a Dana 44.

Brad
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post #3 of (permalink) Old 08-23-2000, 02:33 PM
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Re: amc 20 on a yj?

so how could it be on a yj.....Ive heard of the old 20s on Cj's but the were also shorter since my friend has one on his cj5 but this was a 20 that was the same length as my axles. I thought it must have been a swap but I never knew that the amc 20 was ever made that long

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post #4 of (permalink) Old 08-23-2000, 02:45 PM
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Re: amc 20 on a yj?

It may be out of a J-truck. They had wider one piece Model 20s, but the bolt pattern is different.

If it has a 5 on 4.5" bolt pattern (same as stock YJ), then it may have come out of an MJ. They are rare, but I've heard that at least one year of MJ ('86?) had a heavy duty option (1 ton?) that included the Model 20 rear.

That would be a great upgrade from a Dana 35 if the price is right.

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post #5 of (permalink) Old 08-23-2000, 02:46 PM
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Re: amc 20 on a yj?

Probably a slightly cut down one from an 80s Wagoneer, they had thicker tubes and 1 piece axles.

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post #6 of (permalink) Old 08-23-2000, 03:09 PM
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Re: amc 20 on a yj?

yes.. i would go with a wagoneer.. late model..

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post #7 of (permalink) Old 08-23-2000, 04:09 PM
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Re: amc 20 on a yj?

my bet would be that its a cj frame with a yj body. the amc 20 doesn't fit all the well under a yj frame..the tires get very close to the leaf springs. check and see which side the front differential is on...it'll tell you whats going on..

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