Originally Posted by ato500
Hi, thanks in advance for the help. I have a 89 YJ with a 4in rough country suspension lift and 35/12/15 mickeys. Had lift put on at local mechanic ( I'm not mechanically inclined). He missed a bolt or two doing the lift so I don't have a ton of confidence in him. He also fixed 5th gear and put in a clutch, all in fall of 2012. Took jeep in some mild mud a few weeks ago and heard clunking noise in 4wd. Left mud and parked it at home. 2wd worked fine at the time. I assumed ubolt and he thought same. When driving to mechanic, clunking got worse, only hear it when slowing down and sometimes it continued for a second or two after stopping. Also just at this point it was real hard to get in gear, had to grind to get in sometimes. He checked it out but said needs new rear end ( I know stock yj rear is junk, especially w big tires) and said transmission needs to be replaced. Does this sound right?? Also, what steps should I take if this is right, I'd rather upgrade rear end etc so it doesn't happen again. Thanks for your help.
I hate to break it to you, but it sounds to me like a transmission problem. Your rear-end might not be far behind.
I bought a remanned AX-5 for my rig for 700 back when I first bought the Jeep. The thing nuked on me about 15k miles later while I was on the highway in 4th. It wouldn't shift into any other gear than 4th, and it clunked horrendously.
Prior to the tranny going, I heard faint clicks in my tranny when driving under 35.
Your rear-end is probably temporarily salvageable. He probably cracked it open and found broken teeth on your spider gears. These can be replaced by yourself for $50 if you know where to look. I've been driving with breaking spider gears for almost a year. It's a ticking time-bomb, but I don't drive it hard anymore.
Long story short, I would advise you to upgrade if you are running 35s.
If money is tight, have a reputable shop in your area rebuild your transmission. I got a transmission rebuild almost 40k miles ago and things run great.
Also, replace your tranny fluid once a year. When my AX5 is ready for a fresh change, 2nd starts to grind when shifting. It's just a friendly way my rig reminds me to take care of it