Originally Posted by calimbrium
Turns out it was the rear u joints. Found this out after they failed and the drive shaft took a chunk out of my muffler.
Thankfully it was a cheap and easy fix!
ouch...yea i had a similar issue....my rear u-joint was soo bad it was actually squeaking and i honestly thought it was something in the trans, along with a bad vibration, but only in 5th gear(4" rc lift, tc drop, 33" tires at the time)...i check my u-joints a lil more carefully now after that...don't wanna end up with a hole in the muffler like you...sorry it happened to you.
i should mention that u-joint was a little more than a year old installed right before the lift kit was put on