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2.5L 2wd to 4wd...What all gets added?


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Hey All,

Kind of a broad question, but after I get done with my body work, I will be thinking about installing 4wd. Its a 1990 2wd currently. Any wiring changes need to be made, or is it plug and play? I understand, I'll need a front axle, and transfer case, and associated shift parts....Anything else?

-Erin

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the trannys swap directly. :thumbsup: if you have a 4spd manual now, you'll want to find at least 4.10 gears axles. (you've likely got 3.55s now)

 

finding a 2.5l/5spd donor is usually the cheapest route.

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that should have 3,55 gears. and is way overpriced for a donor.

 

you don't need a comanche. XJs work great too. the only thing is the rear axle will need perches and your current rear driveshaft will need to be shortened.

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I guess my question was...Why a 5 speed? The one in the ad is a 4 speed? Am I missing something? (I was not looking at this as a donor, but more of a question of why the need to swap tranny, as it appears they came 4x4 with a 4 speed 2.5L)

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I guess my question was...Why a 5 speed? The one in the ad is a 4 speed? Am I missing something? (I was not looking at this as a donor, but more of a question of why the need to swap tranny, as it appears they came 4x4 with a 4 speed 2.5L)

 

 

There are 2w trans and 4w trans.......you cannot bolt a TC to a 2w trans...........there is no flange to bolt to.

 

 

Look for a 94+ XJ with 2.5

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There are 2w trans and 4w trans.......you cannot bolt a TC to a 2w trans...........there is no flange to bolt to.

 

 

Look for a 94+ XJ with 2.5

 

That's the info I was looking for. I did not know about the different mounting flanges! Thanks! And...I agree on the 5 speed.

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I guess my question was...Why a 5 speed? The one in the ad is a 4 speed? Am I missing something? (I was not looking at this as a donor, but more of a question of why the need to swap tranny, as it appears they came 4x4 with a 4 speed 2.5L)

 

 

you could have them anyway you wanted. 2wd or 4wd both came with 4spds or 5 spds. the 5spd will have better gearing in the axles.

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a wrangler one could also be made to work, but not directly. you'll still need XJ/MJ t-case linkages and an XJ/MJ AX-4/5 shifter handle. plus the wrangler trannys seem to all rotate the t-case up slightly. this can be a good thing cause it provides a bit better ground clearance, or a problem if the t-case hits the floor (which can be solved with a big hammer).

 

car-part.com can help in junkyard searches.

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I just spent the last hour searching the SE for a 2.5 XJ, there was one in NC yesterday for $750. They pop up now and then but don't last long.

 

If you are serious about finding one it takes dedication and the willingness to run out the door and chase it down when you find one. Can't tell you how many deal I've lost by not getting there in time.

 

 

 

I made a deal in Richmond VA one evening, 3 calls to the seller by 8pm, got directions and gave him my commitment to be there by 9am. Got the wife to bed early, truck cleaned, gassed, day bag and papers packed. I'm on my way to bed to get a couple hours sleep and the phone rings, it's 10:30, seller calls to tell me not to come because he just sold it.........WTF???

 

Who shows up at 10:30 at night to buy a Jeep??

 

 

Same type of a-hole that shows up at 7am........wakes seller out of bed........to beat me out of a 9am buy.........yep.

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This swap is a ways off, but eventually. As far as finding a donor...It will happen when it happens.....XJ's here seem to be pretty abundant. 2.5's are slightly harder to find, but not impossible. There are a couple in the local PNP.

-E.

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