I recently replaced my fried axle assembly with an axle assembly from a reputable junk yard(came with a warranty)It had 60,000
miles on it when purchased. About 3000 miles later, a clunking
noise developed when traveling over uneven surfaces.Could
the wheel bearings or drums be shot?I had the U-bolts checked and replaced the universal.Please help, the repair
shop said it was normal, but I don't think so!

 

Phil,
I saw you posted under lifted trucks you had a 4inch body lift, where did you get it and who makes it and how much? Was going to email you but you have that service blocked.

Pasta

 

Pasta,
The 4" body lift was already on the truck when I got it.
Wish I could help!
Phil

 

Did you swap springs and all or just the housing? I had a GMC that developed that noise and it turns out a big part of it was it had an extremely weak leaf spring on the drivers side. So weak that when it dangled i could pick up the axle without much more force than the weight of the axle. I would also check the shock mount bolts. Those can work loose and rattle back and forth. Go over the U bolts again and make sure that the pin up through the spring (it locates the spring on the axle) is not broken. Is there a suspension lift on it as well? If there is go over all the fasteners on the rear for it while you are at it.

Hope that gives you a place to start.


PS. If the body lift is the plastic block type have a good look at those too. One could have cracked or something letting the bed move a little. Might as well check all the bed bolts. I have had them work loose on me and cause an extra clunk over bumps.