Last year I purchased a 97 Jeep Sahara from my father in law. He purchased this vehicle in 2009 with the intent of modifying it for more than average off road use but never got around to it. I told him that I would make it a project and he sold it to me for $100. It has 148,000 miles and runs (ran) great. Until I recently added a 2.5 inch lift. The lift was installed by a professional using 2.5 inch Quadratec maximum duty springs and Fox Performance 2.0 shocks. I now have driveline vibrations since getting it back and I am sure from what I have read that its a problem with the drive shaft(s). They are pretty rough, so I am upgrading the front and adding a sye to the rear with a cv shaft. I was wondering if someone could tell me about the angle of my rear drive shaft and anything else I may need to reduce or eliminate the vibration I am experiencing.