I am having some kind of drive train issues and I was wondering if you might know whats going on. It feels like my drive shaft is vibrating going any speed while in gear especially under light acceleration and deceleration, in neutral or clutch pressed in it goes away. Cruising at low speeds in 1st gear @ around 2000 rpms if I decelerate the drive shaft shakes very bad and It feels like its right below the drivers seat in the drive shaft tunnel so I know its the drive shaft thats shaking but I do not know what is causing it. The transfer case is built by TRE with LSD, stock rear end and stock drive shaft. I checked for play in the drive shaft and it seems normal. Its an 03 evo 8.
any help?

 

Did you inspect the carriers?