Let me start at the beginning. I have a 1998 Jeep TJ with a 4.0. I put a winch on the front of my jeep and it dropped the front end down an inch. So now I am two inches bellow the rear because of the one inch rake. So I put Jeep ZJ V8 front springs on in hopes that it would lift it back up two inches so that my jeep would be riding level and it did. I then put two inch spacers all the way around for a level two inch lift. I drove it and starting out when the clutch is fully engaged I would get a slight vibration and then it would go away. I read about this so I put a one inch transfer case drop on it and it still vibrates. I am still debating putting another one inch drop but I would think that after a one inch drop it would at least get better. I have done quite a bit of research but obviously haven't researched every single thing so any help would be greatly appreciated.