Need some help diagnosing a vibration I have at 62 mph. I have a 2013 JKUR. I just put on a Metalcloak Gamechanger Lite 2.5" and 35 x 12.5 x 17 Fierce Attitude MT's. I mounted the tires on stock rims with Spidertrax 1.5 spacers. After I installed the lift I had an alignment done at a reputable shop. I have had the tires balanced twice and I still have a vibe at 62 mph, feels like it is in the rear. The steering wheel does not vibrate. It rides and feels great at all other speeds. I took it in today to have a road force balance done and the tech took it for a drive and said it was a driveline vibe not a balance issue. My question is has anyone experienced driveline issues with only 2.5" lift? I want to make sure before buying a shaft that this is the issue. If so what recommendations for the driveshaft and should I do both or just one? Also I am getting ready for a 3000 mile trip, is this something that has to be done before that to prevent any damage or am I okay? Thanks in advance for any help.