I own a 2015 FWD MDX that I would like to use to tow a small travel trailer that weighs in a 3800 lbs. According to Acura, my limit is 3500 lbs but the AWD version with Acura transmission cooler is 5000 lbs. Does anyone know why AWD is 5000 and FWD is only 3500. Same engine and transmission. If I add a transmission cooler, can I tow up to 5000 lbs?