Lift question

I added a 3" suspension lift about 5000 miles ago. After doing this I read a post on another site (sorry don't remember where) stating that he had transmission problems caused by his lift, according to the dealership. I'm now having possible problems with either my trans. or front hubs. It has a slight vibration and rough feel, but when I shift into 4 high it goes away. Any suggestions.

 

front diff drop, rear axel degree shims, or a tom woods 1-piece drive shaft

 

Already added front diff. drop when I instlled lift.

 

Im having the same problem with my taco tranny, Thought it might be a torqe converter or clutch packs. Its not shifting the same as when i first bought it. ie. stays in gear way longer then shifts down hard also higher RPMs then usual. Any suggtestions?

 

I had the same thing with my truck. Got a Tom Woods one piece drive shaft and every vibration went away. Not saying this your problem... But I would check it out.