I bought my jeep with a 4" procomp short arm lift with transfer case drop. As far as i could tell I had no vibes. I just swapped out stock d35 for a d44 that came from another TJ. I know i need to do a sye/drive shaft/adjustable control arms mod next but no funds for that yet. My question is do i need a shorter drive shaft? How can I tell if mine is fine. I am new to the jeep and learning as I go. Pics would be nice on how to check. I took it offroad this weekend and kept hearing something like bottoming out every so often, so not sure. I have been searching the forums since yesterday, nothing that seems to spell out what i need to do exactly. Thanks for any help!