Trans cooler is mounted with the hoses coming out the side, so it will completely empty. Remounting the cooler would be a pretty major project on this one, I'll look into the ford anti-drain back valve.

Sounds like I need to make another attempt at sealing up the dipstick tube, and advice on sealing that goofy o ring setup? A new o ring and a coating of form-a-gasket sort of worked the last time, much better then just the o ring the 1st round. Gene