One problem related to starter has been reported for the 2008 Dodge Ram 3500. The most recently reported issues are listed below.
Driving down my street. The engine shut off and windshield washer function turned on. I pulled over and tried cycling my key to restart the truck. Then with the key in off position smelled something burning. Opened the hood to see the tipm (totally integrated power module) smoking. The truck then started by itself and nearly ran me over (manual transmission truck was in 2nd gear). Truck moved about 10ft before shutting off again. Got truck in neutral before starter reengaged and could do nothing to stop starter from turning the engine over until both battery terminal were disconnected. The truck was towed back to my house and the tipm was found badly burned. About 1/4 of the main circuit card burnt up and disintegrated.