I have a 2007 ST V8 4x4 with 32k-miles on it. The manual (and websites) say it can tow ~6,800 lbs. Other than making sure I have the correct hitch (which I do- Class 3), is there anything else I should make sure I have? Is the tranny set-up for this? Any ratios, etc...I should be aware of? I am looking at 6k-lbs travel trailers and want to make sure if I get a 6k-lbs trailer I can hook it up and tow it. Any towing advice with the sport trac is appreciated!