I have a 89 Escort Wagon, automatic with about 86,000 miles. The manual says that the maximum towing weight is 1,000 pounds. I have a boat, motor and trailer weighing just about 1,400 pounds. I live in a area of NJ that is flat, no hills. If I was to install a transmission cooler and kept my towing to less then 8 miles a trip (that is how far the boat amp is from my house), could I get away with the extra weight with out harming the car?