need help on where to look next. My situation: I have been chasing bad vibrations in my 95 yj for about a year now and Iv'e hit a wall. I have a 95 yj with a 4" rough country lift. Started out with a bad vibration under heavy load( upon acceleration, Deceleration and gassing it at a low speed. I have since replaced Front and rear driveshafts, all ujoints, rear spring and shackle bushings, all shocks,all front end steering components, entire brake system, rebuilt front and rear ends, installed new headers back exhaust, installed sye kit and rebuilt transfer case, also tune up, new motor and tranny mounts and torque stud. pinion angle in rear is looking good for current setup(double ujoint driveshaft and sye). vibration under heavy load is gone and now it's just a constant vibration under any load and I now have a steady thumping vibration after installing new front driveshaft. Help please I am stumped.