HI I have a 2002 Ford 350 Diesel 7.3 liter engine. The other day when I was driving the truck to New Hampshire, the truck was vibrating or shaking pretty heavily through the dashboard and all over. I was concerned but I was on the highway. When I finally got off the highway and shut the truck off then tried to turn it on IT WOULD NOT START. The engine would not even turn over, but the electric works.

So if the battery is fine and my car won't start of turn over does anyone have any ideas of what that could be?

Please help