I wanted to update the other Trail Lite B+ owners with Chevy chassis on the radiator change in Happyjack2. Drove about 1000 miles to KY and back and everything went fine. I couldn't find a shop that could flush the transmission in the time before our trip, but found that it has a drain plug on the pan and changed the fluid myself. The pan held over a gallon. I'll do a couple more changes and hopefully any remaining antifreeze will be diluted. The old fluid looked and smelled fine that I removed.