[kvoman]

You'd also need to add a tranny cooler if you don't already have one. If you don't have the tow package, then your gear is also higher and that's probably why the rating is lower. But you should be able to tow it if you don't do it in 5th or OD, keep it in 4th all the time or 3rd when on hilly terrain. You should be fine with the higher gearing, your gas mileage will suffer a little but at least you will be able to tow your trailer.