I just bought a 2001 Dodge Ram 3500 diesel. It drove smooth the night that I bought it. But the next day on the way to work, I was going about 40mph on a straight road.. and it started shaking like crazy. Almost like all my tires blew out. Pulled over and turned off the truck. Tires were fine. Turned it back on and kept driving. It seemed fine. But I’m nervous about what it could be. Is my truck F’ed up? Will it do it again? What could it be?