I have a 2001 Monaco Dynasty. A couple of times now after driving for a couple of hours, when we come to a complete stop the coach will not go forward. There are no codes showing on the dash. The engine does not rev up when pushing the accelerator and even after pushing the shift buttons, sometime it will go into gear, other times I have to stop the engine and recrank. This seems to "fix" the problem until the next time. Any ideas of what to look for?