New Member and towing question

All the Tow-Haul (button) does is change the point where shifting between gears occurs. The shift will occur at a higher RPM. Also, Tow-Haul will hold a gear from up-shifting if going down hill, keeping the vehicle from going faster and faster and faster, and upshifting going even faster. As stated above, it really has nothing to do with actual towing, weights, and stuff. It is a nice feature WHEN towing, as it shifts at a higher RPM, especially in slower town, stop and go traffic, or down a long grade when, especially when the trailer us pushing.