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Unread 09-21-2010, 06:54 PM   #1
DDT3
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Axle Swap... Cutting Axle

I have a 93 yj. Today I found a 1982 J 10 truck. It has a AMC 20 rear and D44 front. I have been told the axle length's on the J 10's are 65 inches wide and my yj's are 59ish. I am going to do a SOA so I will be moving perches and shock mounts. SO do I need to shorten the new axles or can I leave them at 65 inches? I need to know asap cause these axles wont last long. Thanks.

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Unread 09-21-2010, 07:02 PM   #2
93jeepyj
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It wouldn't be worth the effort to cut them down. You can run wheels with more back spacing to make up for some of the extra width.
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Unread 09-21-2010, 07:24 PM   #3
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You don't want anything to do with an AMC20
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Unread 09-21-2010, 07:26 PM   #4
DDT3
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You don't want anything to do with an AMC20

Why is that?
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Unread 09-21-2010, 07:28 PM   #5
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the AMC 20 just isn't worth the work you'll have to put into it. what is your build plan?
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Unread 09-21-2010, 07:30 PM   #6
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If you don't mind axles that wide the easiest ones to swap when doing a SOA are the Dana 44 front/Ford 9" rear from a 78-79 Ford Extended Cab 1/2 ton. Those had SO leafs on front and I think the spring pad width is only 1/2" wider.

The 3/4 tons are easier to find(they all had leafs) if you are ok with 8 lug rims.
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Unread 09-21-2010, 07:31 PM   #7
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Why is that?
Because if there ever was an axle that's a downgrade (for various reasons) from a d35 it's an amc 20
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Unread 09-21-2010, 07:43 PM   #8
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i only have the 2.5L. I would like to run the 35x10.5 bogger or the 37x13 bogger and gear the axles correctly and go. This is not my daily driver at all. It will only be used in the mud and to drive down the street and fill up with gas. So what does everyone think my best option is? I really dont want to spend alot of money.
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Unread 09-21-2010, 09:00 PM   #9
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as normal the best option is generally an 8.8. The width is about right, it's strong, they are cheap, easy to come by and come in several different gear set ups.

amc 20 has no aftermarket support and if you make a mongrel by shortinging it you will be screwed if you ever need another shaft.
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Unread 09-21-2010, 09:45 PM   #10
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The AMC 20 in the J trucks are stronger than the ones used in the CJs.
They already have one peice axle shafts and the tubes are thicker.
Stength wise they are comparable to a 44.
If it was me I would leave the axles full width.
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Unread 09-22-2010, 01:08 AM   #11
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if the rest of the j10 is ok id take the whole thing and wheel that. theres enough of us yj on the trail. its getting boring.

cutting axles down was pretty common but is getting more rare. with such strong aftermarket support less and less people are doing junkyard rebuilds and just going straight to aftermarket assemblies that come in any width the customer wants. also people are getting used to seeing more aggressively built vehicles. there was a day when having dana 44s with a rear limited slip and 33 made you the top dog. those days are long gone.

id probably use them full width.
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Unread 09-22-2010, 06:19 AM   #12
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there was a day when having dana 44s with a rear limited slip and 33 made you the top dog. those days are long gone.
IMO in a yj Dana 44' are obsolete. You do an 8.8 swap and a shaft upgrade in the HP30. When you get to the point these axles aren't enough you go straight to 1 tons and skip the 44's.

I honestly don't know why the guys (especially round here) are so hung up on the 44,s. Cause from what I've seen they aren't really all that and a bag of chips,and at the end of the day they're still a sissy a$$ .5 ton axle.


In the subject if 37"s on a 2.5L. They don't make a gear low enough that'll make the 4 popper adequate by any stretch of the imagination.
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Unread 09-22-2010, 06:25 AM   #13
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Quote:
Originally Posted by DDT3 View Post
I have a 93 yj. Today I found a 1982 J 10 truck. It has a AMC 20 rear and D44 front. I have been told the axle length's on the J 10's are 65 inches wide and my yj's are 59ish. I am going to do a SOA so I will be moving perches and shock mounts. SO do I need to shorten the new axles or can I leave them at 65 inches? I need to know asap cause these axles wont last long. Thanks.
To answer your question, grab em up and run them full width. The setup in the J truck is a fairly strong setup.
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Unread 09-22-2010, 07:50 AM   #14
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I


In the subject if 37"s on a 2.5L. They don't make a gear low enough that'll make the 4 popper adequate by any stretch of the imagination.

What gear would be my best option? I dont really care if I cant go over 60mph. I am setting up the jeep for hunting, mud and putting around the farm.
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Unread 09-22-2010, 08:53 AM   #15
DDT3
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Also why cant I attach a pic on here. When I click insert image it asks my for a web address type thing. I just cant attach a image from my pics on my computer?
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