Trannie Puking?

[BlueThrough&Through]

I have an 07 with the 6.0 and the torqueshift trannie. Truck has 60,xxx miles on it. Last weekend I was pulling my horsetrailer up a pretty good grade when I could see smoke coming from under my pickup. I immediately pulled over and the whole underneath of my truck was covered in ATF. After further inspection it looked like it came from the dipstick tube. I started the truck back up and looked and looked for a leak and couldnt find one. The fluid was still in the safe range on the dipstick so I started backing up and pulling forward and still no more leaking. I went ahead and drove it the rest of the way home (120 miles) and never lost another drop of fluid. Has this ever happened to anyone else? Could it have been a seal that got to hot and expanded and leaked and will only leak when hot? Just wonderin what I need to do or look at now?
Thanks

[dazdillenger]

I was pulling a 12k load through the appalachians and the same thing happened to me. I didn't have any smoke, but I noticed it when I pulled over to get fuel and saw the entire front of my trailer covered in ATF as well as the rear differential/entire bottom of the truck. Trans temp was solid, never overheated or slipped. Wiped up all the atf, and kept driving. Fluid level was still in the safe range, looked like at least a quart or two was evacuated. Kept on keeping on, and it never leaked a drop again.

[dazdillenger]

Also, my truck had 68k on it when it happened. I am religious about watching my gauges, and the trans temp was solid as a rock before, during, and after the puking.