Re: driveshaft modification when lowering? 5.3 and 4l65e
 

hope you get the problems worked out.

Re: driveshaft modification when lowering? 5.3 and 4l65e
 

Long story short....the rear end that the shop did was the culprit. I took it back for the 3rd time and they re-did the job and resolved the issue. This was after swapping to a 1 piece driveshaft, replacing wheels bearings, axle bearings, etc.

I can't stand incompetent shops...