So I recently developed a little driveline vibration. I started to inspect u-joints and noticed I lost the welded on weight on my front aftermarket shaft. The vibration isn't horrible but it can be felt, and is there from 50-60 mph. My question is can I keep driving it until I can get the shaft re-balanced or do I have to pull the shaft ASAP? Also On a side note I have a speed sensitive whine when jeep is cold. (putting in neutral doesn't change it) I just started to notice this since the weather has been getting colder. Any Ideas?

 

if it's a front shaft, i would pull it and just drop it off at a drive line shop to get balanced. if it's a rear, you should still get it taken care of sooner than later. while it may not be a big problem to leave well enough alone, prolonged vibrations can/will lead to a t-case housing failure.