Thanks for putting this together. There are some really great games on this list
If anyone is interested in the story of the Bradley Fighting vehicle there is a movie. The Pentagon Wars streaming on YouTube for free. Well worth checking out.
Any ideas on what the wiring issue was? Could be a clue as to what is going on now. Especially if it started after the last issue was fixed. Could be as simple as something left unplugged. I have done that more than a couple times working on my own vehicles.
Did you check the fuel injectors by any chance? Misfires could be the source of the engine shudder for sure.
Are you meaning that you cannot power off?