Thank You everyone for your efforts. I am not sure I really know the answer as there seems to be a big difference of opinion on the topic. But at least I know the sounds and symptoms I had experienced going down and up a hill with Tow Haul on was pretty much normal and nothing apparently to worry about. The E-450 runs great and is very quiet so when it went into those gyrations it kind of set me back and as it is a used MH every squeak and noise makes me a little worried. Someone posted from the manual that if it is in TH that it will return to normal when you start up the next time. Maybe that is on a new rig. Mine stays in TH until I press the button on the shiftier to shut it off. But thanks for the information anyway it was helpful.