89 xj 4.0 auto 242. I have the 242 transfer case and when I'm reversing in 4H I get a howling noise, like its slipping. It does not happen in 4L or 2wd. It will reverse in 4H its just when its under load it slips. I was thinking the chain but I would think it would slip in 4L worse if that was the case. Any ideas??? Thanks.

 

Everyone's as stumped as I am?

 

This is the second time I've posted this question. Nobody can help me out?

 

Jeesh I'm gonna have to become a member of Naxja.

 

does it actually slip or just makes the sound? I am confused on what exactly your symptoms are.

 

It makes a howling sound while it slips. Only happens in reverse though while going, say over an obstacle or up a steep incline. If I put it in 4L it doesn't slip, doesn't matter the incline or obstacle.

 

hmmmm, sounds like a tranny issue. Have you tried going over the same obstacle in 2 wheel drive? it might be that in 4lo its not putting that much strain on the tranny and not causing the issue.

 

if it is in fact your t-case slipping you need to replace the chain inside,its stretched out

 

X2 on the chain stretched. but that usually makes a hell of a racket.

 

you have that crap differential inside your transfer case which is prone to fail under load, i would assume that is it, cause my wife's 249 all time 4x4 did the same thing n reverse, put a NP231 on and it was fine

 

Yeah I'm thinking about switching to a 231. I never even use the full time 4wd. Also it doesn't slip at all in 2wd just 4H in reverse. thanks

 

I have NP242 in my truck and I just replace the chain last week. If i put it in 4hi, 4ft, or 4lo and i would get on the gas even a little put it would go snap snap snap clunk snap lol. but i never had any howling, I replaced the chain and its good now. enless its skipping the gears inside you should replace the chain. IMO put a np231 in it. cuz the chain is gonna run you like 100+ and all the other goodies when im sure u could find a np231 around that price or a little bit more and be happier.

Also if you put it in 4lo and in reverse and gas it hard. It should defenetly slip.

 

I know it's been a very long time since anyone commented on this thread, but I'm having a similar issue on my 92 xj. When I put the transfer case into 4 Low and put the jeep under a load like climbing a hill, the vehicle kind of shakes and rattles. Did anyone find the solution?

 

Check your engine and trans mounts.