[Choxnpinz]

Unfortunately, I was towing in D. I think that may be the problem, but I also think I'm going to take it in and have the fluid & filter replaced since I am worried that I might have cooked the fluid.

I just found it odd that I towed the camper all last summer with no problems and suddenly on this trip the spiking occurred. Didn't even happen on the way TO the campground, only on the trip home, that's why I figured something might be wrong. Thanks for the replies, folks!!