I have a question about my 1991. Its a 4X4 automatic. I live in Phoenix and in the summer time my temp gage reads about 70-80% deflection or more. The truck has never overheated but if my gage is to be believed it has come awful close. Is this normal in 100F plus heat? Will the new thermostat decribed in the FAQ section help this? Also, the indication seems to be hotter than it used to be. Do you know if the sensor or the gage has a history of becoming inaccurate? I have changed my radiator to a four channel core cross flow. Thanks for the time.