I am having noticeable shudder during light or hard acceleration from a stop AND vibration from the rear end when making a turn (only) from a stop, but not going straight.
Here is the question I need to ask,I changed my rear end fluid back in november and am reading alot of people having the same problem.Would changing the fluid have something to do with my problem,were they suppose to add something to it.some guy's are saying to put in a friction modifier is that a temporary fix.

 

Sounds like the infamous driveline shudder to me...

It has yet to be permanently fixed to my knowledge.

 

hammer... try going to the transmission forum,
there is a lot of stuff in there about shudder.
cheers.