Geonovast

Yes, NGK or Champion Coppers. Get those autolites out of there, and no platinums.

Hopefully these will help explain... The second picture is what you were experiencing, except in your case, the front wheels would be stationary, one or both rears would be spinning, and only the middle shaft in your front axle would be powered. Basically, the old CAD systems had two points for engaging 4wd. Both have to be engaged for 4wd to work. Locking over the CAD will not cause you to be in 4wd all the time, as illustrated in the last picture. Everything's rotating, but the front and rear axles are not locked together, front isn't powered, so you're good to go. As stated before, Jeep eventually did away with the troublesome CAD anyway, and the passenger side axleshaft in the front went to one piece. Also, all Select-trac Jeeps(aka AWD and Full Time 4wd) did not have a CAD. edited/updated for clarity.

NP 207 was 86 only in the MJ. You have a 231. I bet you anything your T-case is fine, if you're not getting any noises from it. Best way to check, is with the truck off, shift into 4wd, crawl under, and see if you can turn the front driveshaft. If you can, T-case is toast. I'm betting you won't be able to. The CAD is your Central Axle Disconnect. It separates the two pieces of the passenger side axle shaft. It's controlled by a vacuum motor, run off a switch on the T-case. Many, many things can, and will, go wrong with this system. Your best bet is to lock it over and not have to worry about it anymore. Easy enough to do : viewtopic.php?f=9&t=18415

Haven't looked, but from what I can tell, it's been a WI truck most of its life, and basically, WI doesn't give a rat's @$$ about emissions.

Hold up a little bit on replacing that 231. How do you know your 4wd stopped working? How are you 100% that it's the T-case? Sure it's not the CAD? To clarify, in case you do need a new T-case, you have a short shaft 21 spline input. All Pukey BA 10/5s used the 21 spline, AX-15s used 23. AW-4 used both, I believe the changeover year was mid 90 or 91 from 21 to 23. 4 cylinder cases will be useless to you, as they have a longer input shaft and probably won't bolt up. You'd need to be aiming for an 87-90 4.0 case. Also, your throwout bearing/slave cylinder are going to be one piece.

Ground strap, CPS. Are the new plugs getting gas fouled at all? How bad is the miss?

I'd look at the 2.5's just for the hell of it, but the damn hood won't open.

I have no idea what he's talking about either, though.

I believe that's your MAT sensor.

It's obviously toed out. Any chance the axle's bent? Cs are bent? Replacing the tie rods won't fix the problem unless your current system won't keep an alignment. Even a bent tie rod wouldn't cause this problem. It'd cause it to be toed in, and an alignment would fix it. Trading it in is overkill. Worst case would be a new axle. Do an alignment yourself. http://www.4x4xplor.com/alignment.html .... with GOOD tires on it, on flat, level concrete.

If you just swap the longblock, you should be fine. You're going to have to put your distributor into the 97 motor, however. I put a 91 XJ 4.0 into a 98 XJ, and only had to swap the dizzy. Motor works beautifully.

91 c-clip D35 in my 2.5 MJ has a 6 point 5/16 :nanner:

Does the truck roll with the clutch in? Is there fluid in the trans?

Shouldn't be that difficult to get it un-stuck.

MJ springs also have a lot more arch to them, so an XJ AAL wouldn't really lift it that much either.

Ohhhh. I guess my idiot filter automatically switched that to 1987. So used to it on CL, I don't even notice it anymore.

Hey now, that there 0331 started mid year. Both my 99 and my dad's 99 have the 0630. :cheers:

If it is an HO motor, not only are the intake ports on the head different, but the flywheel is completely different. The CPS pickups are not the same, and will result in a no spark. You need to verify what motor you have. A build date should be stamped on the block, and there's a head casting number too.

Wondering if any of you have/know where to get some plans for hacking the frame off a swb and turning the bed into a trailer.

I don't get it.

Is it just me, or is the motor crooked?

It will not fit. The 4 cylinder manual transmissions (AX-4/5) used a long shaft input on the transfercase. Pukey and AX-15 need a short shaft.

Glad it worked. :thumbsup: Little pricey though. :ack: From what you described, it sounded like the clutch fork was binding up on the input shaft.