new user, questions
 

hey guys, i am a new member, first off i would like to say thank you, and that i've used the forums before for basic questions, and finally decided to register as a member.

ok, i have 2 Cherokees, a 1998 4 door 5 spd, and a 97 2 door auto. the 4 door runs and is my daily driver, but is really beaten up and rusted. the 2 door doesnt run and needs a new engine. my question is, will i be able to drop my running 4.0 6cylinder into the 2 door? i would like to as the 2 door is very clean and has little rust. is there any problems with swapping the engine from a standard car into an automatic? issues, problems, or is it even possible?
again thank you!

I think you are fine. If you were going the other way you would need to make sure the pilot bearing was right. Normally you use the PCM with it's Jeep/year, and the sensors for that PCM. The engine sensors between 97and 98 may not have changed much though. Probably better to go ahead and keep the sensors from the 97 with the 97. I'm sure it's easily done, I'm not sure if you need to change the manifolds or any bracket's or anything. You can actually put a 99 in an 87 if you change everything to match the 87 Puter!

What I mean is don't change the PCM or the sensors, just the engine.

So you think just a straight swap will work? I've done repairs and other stuff on cars before, but never anything as in depth as an engine swap. I just don't want to get halfway through and realize its not going to work at all

Yes, it will work. Maybe very late 99 up to 2002 have issues. Even a manifold job, (or head), I'd recommend somebody new have somebody who has been there available. It's pretty involved, and dangerous hoisting an engine. A neighbor, an uncle....somebody.

Oh yeah I have a couple buddy's who have been around cars their whole life. Should be simple then from what I'm understanding. Thanks

Well, "simple" we'll see! How about "fun". Let us know how it goes....

No engine swap is either "Simple or Fun" well in my race car I can swap an engine in about an 3 hours but that is a whole different story and a transmission in less than an hour.........Now to my Jeep I have no idea how long for a complete transplant like your planning on, lot of things in the way and wiring out the kazoo. If I had to guess it might be 50-60 flat rate hrs. don't know.

If I were doing the swap I would keep the AW4 trans in the one I wanted to drive just me. Would make things a lot easier for you also not fooling with the shifter, TC, clutch, etc.

I think he is just taking the engine out of the manual and installing it in the auto. I wouldn't finish it in a weekend...might have it in though.

Yeah I'm just doing a straight engine swap, keeping the auto tranny in, although I would consider swapping the manual in after a while

I doubt you want to try that....Anything is possible, but installing a clutch pedal and master cyl, and the computer issues...I wouldn't myself.

True, I hadn't thought of that, in my head I just thought, "oh ill just cut a hole in the floor for the shifter." I'd love to have the manual, but 2 doors are where my hearts at.

Depends on what's wrong with the engine. If it's something mechanical you will have no issues doing a total transplant and winding up with a 2-door 5-speed.

Basically what you need to know:
- The two long blocks are identical
- The engine sensors are identical
- The accessories are identical

The following are "matched" and define the differences between a slushbox and stick XJ:
- PCM
- TCU
- Engine wiring harness
- Transmission
- Transmission wiring harness
- Flywheel vs. flexplate
- Bellhousing & clutch vs. torque converter
- Transfer case input gear
- Clutch hydraulics & pedals
- Transmission mount & cross member
- Rear drive shaft
- Crankshaft position sensor

So, if you take basically the entire driveline and all of the engine bay over to your 2-door you'll be set. If you do that I recommend thoroughly testing sensors so that you wind up with the best functioning units. You can also take the opportunity to slap on a new exhaust manifold and fuel injectors, change the oil filter adapter seals, clean the throttle body, etc.

Retain the AW4.

You're bsically doing a long block switch, bellhousing forward. Piece of cake.

Edit: You should have a Factory Service Manual to do this job, for torque values, etc.

Pacific Coast Manuals sells pdf manuals cheap.

http://www.pacificcoastmanuals.com/j...e_manuals.html

Guess the body with the 5 speed is yucky, he'd need to put a petal/master cylinder in the (Edit,) 2 door.

Yeah the body on the 5 speed is no bueno, and not worth it, to me at least to do all the bodywork needed.