I had the vehicle taken to an AAA approved facility (this happened on the road) on a roll-off never turning the engine off. Technician checked codes, wiring, etc. Nothing found. They kept it 2 days while we stayed in a nearby motel. They tried driving it while cold, while hot etc trying various driving styles and could not reproduce the issue. They did not charge me a cent either as they said they could not fix anything. Great people in Montgomery AL. It's been over a year and the problem has never occurred again. It was a one time event up until now. An isolated incident. No telling the cause. My own thoughts are that today's vehicles are far too complicated for anyone to design them properly or fix them. Other than this incident at 105,000 miles I've had no other tranny problems at all. In fact the only other problem was 6 years ago with a water pump bearing failure, tossing the belt and overheating the engine which caused the heads to warp and leak antifreeze until I replaced them. That was at 47,000...