If you aren't using the rear AC and you have water coming from the passenger rear tire area then your rear heater core is leaking. If the rear AC is on then that's probably condensation. Your DD has electric fans so there is no clutch, of course. All of that cooling system work means you may have not bled all of the air out of the cooing system and that will result in overheating. That process is tedious and time consuming on the V6 and only mildly so on the V8.