I am considering buying a 27' Chaparral Deck boat. I am estimating that it will run around 7600 lbs as towing weight: boat has a dry weight of 4600 lbs, plus say another 2000 lbs (?) for the tri-axle trailer plus say 1000 lbs for gas, toys, etc. My 2003 Ford Expedition has a rating for a Gross Towing Weight of 8800 lbs. Is the estimated 7600 lbs just too close to the 8800 lbs rating, or is this going to be ok? Sure do like the boat, but don't want to buy it and kill the transmission....Thanks