I have a 1992 Ford F350.Just replaced the rear end. It still makes a clunking noise when I put it in reverse. What could it be

If your problem is a clunking when putting it into drive or reverse then usually taking the drive shaft apart and greasing the slip yoke solves that problem.

Check drive shaft assembly for worn u-joints.if OK check for worn pinion bearings or loose pinion nut.This can all be check shaking drive shaft at each end and looking for slop in u-joints or pinion flange.

check front end bushings and suspension setup sounds like bushings are worn out.or shocks are needing replaced

Check your U-joints in the driveshaft. Also make sure the axle is properly bolted in place.

if this noise wasn`t there before the wheel bearing was replaced and only showed up afterwards then its a defective wheel bearing.shops have this problem from time to time when a cheap qaulity bearing is used as they are not made to the same specs as a qaulity bearing,also have the cv joint checked on the same side as it could have a problem from changing the bearing for what ever the reason.the joint may have moved more than normal when its installed in the car.strange things happen at times.

I would start by replacing U-Joints. They are really common issues when it comes to clunking noises. I'd start there.

u joints rear end front driver

sounds like either a sway bar end link or shock, more towards the end link tho

What kind of noise? A clunk, chatter, whir, grinding, or what? If it's a clunk, you may have a worn U-joint. Test by holding brake on and change between drive and reverse and back. If you hear a "clunk" when the tranny engages, it's probably a worn U-joint. Not a hard repair to do in the driveway. Always change BOTH front and rear U-joints - if one's worn, so's the other.

Hey Have You Thought About Replacing The Cv Joint They Usually Make A Very Clunk Clunk Sound When They Are Going Bad. One Good Indication Would Be When Your Turning It Does It Worst.