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Old 09-02-2012, 12:01 PM   #1
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Thought it was a clutch problem...

Turns out my front differential is shot. It's stock original and looking to upgrade it without breaking the bank (like most others).

Purchased the YJ just a few months ago and did very little homework before buying it. From all the dried mud all over the under carriage, under the hood and every little crevice possible, the previous owner did have a blast with it.

Now it's time to un-handicap this beauty and give it some new legs, ligaments, etc.

It's a 1989 YJ, 2.5, 2" body lift, 1" front and rear shackles, 31's.

Use it as a daily driver and will likely take it off road in the future, but not sure yet or how often I will.

With that said, I plan on handing it over to my son in the next year to two once he gets his license. He will probably do some damage in the tough terrains, so having the right equipment now is essential too.

What size diff do you recommend and are there any that can be used off other vehicles? Heard someone say that I could use a Ford front end?

Any/all advice and recommendations are greatly appreciated.

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Old 09-02-2012, 02:18 PM   #2
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No. A Ford rear end is a good choice. the Ford 8.8, from an explorer or Mercury mountaineer, its the choice swap for a rear end.

The front end that is in your YJ is a Dana30 hi pinion. That front end is just as tough as most of anything that you can swap into it.

If yours is truly scattered, and its not just the CAD (center axle disconnect) giving you problems, then i would go to a salvage yard and search for a new front end. You need to look for a YJ or TJ with a 2.5 in it, and you will get the right gearing, all of them came with 4.10 gears when it was coupled with the 4cyl 2.5L motor.

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Old 09-02-2012, 03:51 PM   #3
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Thanks for the reply 0III0forlife. Will shop around the junk yards in my neck of the woods and see what I can find.

Is there a need or recommended that I swap the rear for the Ford 8.8?
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Old 09-02-2012, 06:50 PM   #4
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With a 2.5 your Dana 35 in the rear should be plenty. When i swapped in a 4.0 and added 33's my Dana 35 gave out quick on the trail. So I researched and went with the Ford 8.8 4:10 with disc brakes. I got on in real good shape from a junk yard for $200. I went ahead and did my SOA at that time as well. The 8.8 is almost bullet proof.
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Old 09-03-2012, 07:16 PM   #5
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Quote:
Originally Posted by 10huey View Post
With a 2.5 your Dana 35 in the rear should be plenty. When i swapped in a 4.0 and added 33's my Dana 35 gave out quick on the trail. So I researched and went with the Ford 8.8 4:10 with disc brakes. I got on in real good shape from a junk yard for $200. I went ahead and did my SOA at that time as well. The 8.8 is almost bullet proof.
Thanks 10huey. Will keep that in mind. I'm a newbie so bare with my naiveness. What is an SOA?
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Old 09-03-2012, 07:20 PM   #6
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Thanks 10huey. Will keep that in mind. I'm a newbie so bare with my naiveness. What is an SOA?
Spring Over Axle...

cheap lift basically.
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Old 09-03-2012, 07:28 PM   #7
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