i'll go out and check the u bolts today the car starts vibrating at 65 and gets worse the faster i go but i don't let it vibrate for more than ten sec before i slow down
Don't just check the bolts holding the shaft on the pumpkin and yoke, but drop the shaft and check the joints. This is a likely culprit. If they don't rotate on their bearings easily and freely, all 4 per joint, then it needs replaced. If the joints are not able to be greased, as many are not, then the rate of failure is significantly higher. If you replace any, make sure you get ones that you can grease. They will last longer, especially if you remember to shoot some grease into them once in a while.
