[Critter]

Unfortunately, I don't think any warranty is implied or inferred off of a craigslist purchase. It's buyer beware and pretty much any court would see it that way UNLESS there was something in writing. As far as the drivetrain problem eagleuh1 might be on to something. When we run cars on the dyno with a lock-up converter switch on the dash, if it gets left on when the dyno brake is turned on, it will pull the vehicle down and kill it, that goes for 800 ft*lb diesels as well. I know you said it drove fine for a time, maybe a wire came loose or is shorted out etc keeping the converter locked???