The only thing I can think of is a bad CV joint or U-joint. Have you checked them?
Also, when you say you feel it is more in the seat, chances are the problem is more in the rear of the vehicle. Have you checked wheel bearings and rear h-joints? Also, make sure the differential fluid is full.
Let me know what you find.
Wednesday, August 4th, 2010 AT 6:10 PM