I installed an Autometer electric trans temp gauge on my Tacoma. The sender is located in the trans pan. The gauge has been installed for a couple of years or so. But, lately it's been reading higher than the actual temp. For instance, on a cold start up, it would read below 100* and when it warmed up, it would read about 180+. Guage range is 100* - 250*. But, now on cold start up it reads 150+* and when it warmed up it would be pinned at the end of the sweep, which is past 250*. I have replaced the sending unit and gauge with a new one and even bypassed the installed sending wire with another sending wire connecting the gauge and sending unit. It still reads the same. I have checked voltage to the gauge and have ~11.5v. The only thing left I can think of is replace all of the wiring. Anyone have any suggestions?
