I'm curious about towing on mine. I have a 2010 XLT and do have the towing package as far as I can tell. 7 pin connector, etc. But, I have a 3.31 rear end... What should I expect to be able to tow with that? I know a 3.73 would be much better, but am thinking about a bumper pull travel trailer. How much trouble is it with the 3.31?