I need some help please. im about to purchase a zj off a guy simply for the trans the rest of the parts are just goodies. but im not exactly sure how to check or have hem check and make sure its a 42re.


http://baltimore.craigslist.org/pts/3344960539.html

the link for the ad. and i looked around and found where almost all zjs with the 4.0 were 42re's but i kinda wanna get something that i feel comfortable knowing before i make an hour drive and drop some cash

 

It's got a 42RE. All 93 and a half and up ZJs with the 4.0 have the 42RE transmission.

 

ok so no worries. 100% ill be able to throw her into my 98

 

Sorry I've been off-line. If you've picked up this good luck. Maybe it will work with only you needing to switch sensors.
The '98 ZJ trans was a one year only deal according to a friend at the JY. Maybe it's only the sensors that are different, but the interchange says they won't work, even though they will bolt up. He's in business to make money, so I believe he'd sell it if it would work.
The following is from Wikipedia, (which isn't worth much)
ZJ Auto. Transmissions:
AW4-'93 4.0L
42RE-'94-'98 4.0L
46RH-'93-'95 5.2L
44RE-'96-98 5.2L
46RE-'98 5.9L

 

i havent gotten it yet. but its coming with a good motor and trans, 4in RE lift with polished alum rims and half treaded 32x1150s and im getting it for 350. so for the rims and tires and the lift its more then worth it. hell for the rims and tires alone its worth it. i have a week to pull off what i want, part out what i can. and i know a local yard will give me 300 cash for the body. (well they gave me 300 for my other zj with no motor trans or axles no interior, majority of the suspension so i figure with just the motor and trans rims and tires and some suspension i shouldnt have a problem getting my money back quick.



hopefully it does. before i pull mine ill look both them over real well and probably post pics and get a second opinion from everyone (mostly you)

 

You're right, you can't go wrong with that.

As far as the trans goes, I'm thinking it might be only the sensors that are different, but even those small things would stop the JY from selling it as a plug and play unit from what my friend says.
I'd install the sensors from your trans in the replacement trans before trying it out, to prevent the older sensors from possibly doing any damage to the '98 TCM.
I don't know much about transmissions, this is just my opinion on this. I do know the '98 ZJ TCM is different from earlier versions, and everything changed for '99 when the WJ came out. So '98 is a one year only TCM.

Hopefully others will chime in here with more advice.

 

yea if all the sensor spots are the same and eveyrhting is the same its worth swapping my sensors with the new trans since i know mine all work and work good.

 

Just a warning. Wiring and all electrics inside the trans are different. It's not gonna work.

My question is what's wrong with the one in the 98? Not shifting out of first?