I don't think towing and tongue weight are necessarily related (increased towing weight means more tongue weight). Whether the towing capacity is 3500 lbs or 5000 lbs on the Passport, the hitch is the same -- which means the tongue weight is not changing.
EDIT: My comments are specific to the Passport and the "standard" towing capacity with the Honda OEM components vs the 5,000 lbs capacity. The parts are the same except for the addition of the ATF cooler.
EDIT: My comments are specific to the Passport and the "standard" towing capacity with the Honda OEM components vs the 5,000 lbs capacity. The parts are the same except for the addition of the ATF cooler.