So I'm driving today, 30mph, hit the gas and the tranmission loses all power out of no where. VX rolls to a stop and has minimal movement (like a foot then dead) when in drive once you go from neutral to drive. I turned it off and now it won't start but the started is grinding away. However when it was running it was running fine but there was a loud knock from the area where the engine and tranny mount up, that's why I turned it off. There is not any fluid leak or drips anywhere.

I'm thinking the flywheel is tore up but would that stop the car from all driving power as well? Or is this more than just that?? Ideas?