At about 60 mph I start to feel a vibration, this gets pretty bad at about 70 mph. Driveline shop says all is good...rotated wheels and tires, no help! New wheels and tires no help. About 3 months ago I had a VB job, Transgo siift kit and a triple disk TC installed. I dont recall ever having this issue prior to that. The driveline shop says whatever it is, is coming from the rear? We put the rig up in the air and ran it, it vibrates so bad you can feal it in the hoist that it was on. If you place your hand on the TCase while it is running you can really feel a vibration. Have a call in to the Tranny shop, but wanted to see if you folks have any thought?

Thanks