I've changed both rear tires, both u-joints, had the driveshaft rebalanced & still have a vibration at
65mph +. I just got back with it from NY with no problem, any sudjestions would be helpful. Thanks
The vibration you can feel it coming from sitting in the seat, NOT in the steering wheel at all. At around 63mph it gradually comes in but at 65mph its there steadally it does not get worse or go away. Its like a vibrating seat. I had the truck on jack stands today after work. The only thing that pretty much was not checked was the differential assembly, I think its a junk yard rear end.