I'm going to do my best to explain everything here in hopes somebody can point me in the right direction. I have a 97 Sahara edition with 33 in tires and no lift (say that only because it may be part of the issue). I usually only drive my jeep on some slightly curvy and hilly roads around my house and sometimes it will shake violently when I hit a left curve with any speed. I end up needing to really back off the accelerator to make it around the turn. The weird part is that it really only seems bad within the first 2 miles of driving or so then seems to stop. So it always seems to do it around the same curve leaving my neighborhood and them maybe once afterwards randomly. The shutter can be felt through the steering wheel and manual stick. I have replaced all shocks because they were due so those are all new. I've greased all bushings that I can find in the steering system and they all look good. I don't see anything loose in the tie rods or steering system and I don't hear anything that would indicate a bearing. The only other thing I can think of is that there is a slight leak out of the front of the transfer case (can't remember off the top of my head what that seal is called), which I replaced years ago and it went right back to leaking which leads me to believe that a bearing in there is bad. This has actually been going on for a long time but I'm just now dealing with it. Any help to point me in the right direction would be greatly appreciated.