The boss and I took the Bronco out for a drive yesterday evening to grab a bite to eat and see some friends. It was about a 10-15 mile drive to the place we wanted to eat at. I backed into a parking spot and as I was walking past the front end I noticed something dripping under the Bronco. I opened the hood and the coolant recovery tank was overflowing. It had never done that before. The radiator was warm to the touch but not so hot you could not leave your hand on it. According to the engine temp gauge it was running around 180 degrees, the outside temp was in the low 80's. It has never did this before even driving it in temps well above 90 degrees. The temp gauge has always stayed around 180. I have never changed anything on the cooling system except for putting a new 13lb. radiator cap on. The Bronco has what looks to be a 3 or 4 core radiator with a full shroud and a 6 blade flex type fan, this was all from a PO. I don't know what thermostat is in it. But as I said it was puking coolant out of the recovery tank and then on the way home if I was stopped at a traffic light the temp gauge would start going up and got as high as 220 degrees. It has never been that high before but I made it home without it overheating. One other thing I will add is that mt Bronco has a Dakota gauge cluster in it installed by a PO and I don't know if it is reading true or not. I know the fuel gauge does not and the speedo has never read true. This is just out of the blue but am I looking at a thermostat issue, possibly gone bad, that's what I'm thinking.