89 xj 4.0 auto. I have a 242 transfercase and recently it started to slip?? It only happens in reverse with moderate strain in 4H or Fulltime 4WD. It won't slip in 4L. It doesnt sound like a chain skipping, its more of a howling??? I changed the fluid and used the correct trans fluid so I don't know whats going on. Any help would be great, Thanks

 

I have a similar problem, but I was thinking it was my trans. I get a loud grinding sound when reversing hard but it dones't matter if its in 4wd or 2wd. I've replaced my front and rear axle with newer units so that is ruled out. I have the correct fluid and level in both trans and transfer case. I've posted on a couple boards and gotten almost no responces I've even bumped it once in a while for a couple months.

I am interested to know why is only in reverse. So if you find out a cure keep me posted.

 

Definitly not my trans because it only happens in 4wd. I also don't get any grinding noise more of a howling. Like a wood chair on a wood floor.

 

bumpiddy bump bump.