So I've posted about this before and have been into the shop many times afterwards. Still have an issue with my truck and a vibration at 80km/hr. The first time in ford changed the whole driveshaft slip yoke and u joints. Still occurred. Next time they figured it was an unbalanced wheel and still didn't fix it. This is the 4th time into the shop for this.
This time took the service manager again for a test drive cause miraculously he didn't feel it when I had it in so he didn't do anything to it. During the test drive he said he didn't feel anything but my lower back and legs were shaking. We got out an he said oh the problem is the snow in your rims. There was literally a skiff of snow in one of the rear rims. This was light snow and covered approx 3 inches by 1 cm high.
He swears nothing's wrong with the vehicle and won't fix it till he can feel it(which he has in the past test drives as well). He suggested getting a third opinion from another mechanic. I just don't know what to do cause I really dislike drving the truck at 70-90. Any idea or thoughts???