Picked up jeep a month ago with poor vibration. Sent it to the shop they tried what what was easy and said it was the tires. long story short i took off the front driveshaft and that was 90% it...fix the shaft then had the rear balanced..Twice by to different shops..because ...i still have a vibration as i accelerate and then as i let off the fuel it goes away. 35's on 5.5 rubicon express lift w/auto