87 4.2L Automatic, Weber Carb, 4" Black diamond Lift, 33" MT tires, 1 1/4 TC drop.
I finally got my jeep running good and everything seemed fine while driving. After a few days i noticed that i was getting a slight vibration around 35 mph. That vibration is now noticably worse. Once i hit 35 the vibration starts but its goes away over 50 mph and feels pretty smooth. I also notice it when I'm slowing down (under 35 mph). I'm thinking its either the tire balance or its the rear drive shaft. No play in the rear drive shaft so I've ruled out u joints for now. Any input?