I recently installed guages on my truck. (2000 f250) For the trans temp gauge I installed the reader through the test port on the drivers side of the transmission. On the highway I'm usually between 140-160 but in the city it can climb up into 180. I live in Miami so when I say city I mean stop, go for a couple blocks and stop again. Ambient temperature has been anywhere from 85-95 this past week. I also have a hard shift from first to second it kinda slams into gear and maybe that's what's causing the higher temps. Any input would be helpful. THANKS !!