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Old 04-19-2008, 11:25 PM   #1
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Engine Swap 90cheroeke 4.0 Auto Into 94 Wragler 4.0 Manual

Hi,
I'm looking for anybody who might be able to advise me on the engine swap
that I'm attemting to do.Last week I blew the engine my 94 wrangler 4.0 &
towed it home.Within a 1/2 hour a friend offered me a said to be a "good running engine" for free, it was in a 90 cherokee auto.I thought with a little
effort I can make it work after all a 4.0 is a 4.0 right ??? So I swapped the
water pump,intakemanifold,exhaustman,ect. so everything would match the
chassie hook-ups in the wrangler,so far so good, no major problems until I
went to add a piolit bearing to the engine crank. It had the auto trans in it so when I pulled the t-converter of there was no piolit bearing
behind it.So I go to the autopart stores to pick one up they don't have any
of course. I was shown the normal looking the flat roller piolit bearing. when I
got home to compare it to the old one on the blown engine it seems to apear
as though is seated in a sleeve pressed into the crankshaft,so anyways that's
my situation any help or advise woul be great !!!

Thanks,
Rich

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Old 03-31-2011, 10:50 AM   #2
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Didnt you ever figure out your problem? Im stuck in the same boat. Just blew the engine in my 94 wrangler 4.0 manual wanting to swap it out for an engine in a 91 cherokee 4.0 auto

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Old 03-31-2011, 01:36 PM   #3
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I don't think the flexplate from a autotrans engine will work with a manual trans. The manual trans engine needs a flywheel.
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Old 03-31-2011, 02:41 PM   #4
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Could I just swap some
Parts from the 4.0 in my wrangler?
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Old 06-02-2011, 10:23 PM   #5
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ford used a similar set up that used a steel piece that went in the crank then the pilot bearing goes in that.i think thats what you mean.try a bearing from the dealer or see if they can get that piece for you.or make one on a lathe.
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Old 06-13-2011, 11:06 AM   #6
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I got a 97 jeep xj 5spd with the 4.0 (blown) and also have a 93 zj with this engine (auto) and im gonna do the swap this weekend, and I saw the post and the issue that you have and im kind of confused, so we need to buy a new pilot bearing? to put on our 4.0 (the one that came of from an auto trans) and install al the things of the standard trans?
i got some skills on the mechanic side, so im just wondering what is the list of all the things we need on this swap?

remember I got all the parts on the 97 5 spd xj 4x4 and all the parts on the working 93 zj 4x4.. any mods? advices?


thanks
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Old 06-13-2011, 11:15 AM   #7
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well, first you have to swap out the flex plate for the flywheel. And I can't tell what the OP was saying, but it almost sounds like there isn't the hole in the crank shaft for the pilot bearing.
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Old 06-14-2011, 07:08 AM   #8
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Quote:
Originally Posted by deathphoenix99 View Post
well, first you have to swap out the flex plate for the flywheel. And I can't tell what the OP was saying, but it almost sounds like there isn't the hole in the crank shaft for the pilot bearing.
So you're telling me that i can't make the swap if i don't get the pilot bearing done (crank hole)?? i was planing to do this weekend seems that I need to keep looking for testimonials of auto to standard trans swap (engines) or if any one know tips of this please help.

thanks!
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Old 06-14-2011, 07:56 AM   #9
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I honestly don't know. I know on Chevies, you swap the flexplate (auto) for the flywheel (manual) and it'll work. But if the cranks are different between auto and manual, then there may not be a spot for the pilot bearing, which means it won't work. But as I stated, there's no pics or anything, that's just what I believe the OP was saying.

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