I am experiencing what seems to be either a clunking sound or slip when I accelerate moderately. If I take it easy it normally shifts a little rough but I don't notice any slipping or clunking. This happens between shifts 0-40 mph. Also, I don't know if this is related but sometimes when I stop if I stop abruptly I feel a slip in the front end. If I stop as smooth as possible I don't feel anything. I just purchased this vehicle and it has 71k miles, it is a 2002 Ford Explorer Limited 4WD V8. I don't know if this is a problem but it is a little annoying since I just purchased it and didn't notice this during my test drive.
I drove my explorer last night and thought of something. I have been driving with overdrive on. I turned overdrive off and there wasn't any slipping or clunking, but the shifts seemed a little rough. Another thing I noticed was, is that when I "gun" it and at around the 2nd gear or so I feel a little resistance or scratchy noise for about 3 seconds and then it goes away once it reaches the next gear. I don't know if this has to do with the transmission or engine. Also, everytime I punch the gas I hear a little scratchy noise in the front end that sounds similar to a diesel accelerating. Does this sound like an issue?
I took the explorer into the shop and they determined I have a bad torque converter. They said this was the cause of the rattling noise when accelerating and they would see if it fixes the rest of the noticeable shifting problems. Thankfully it is under warranty.