Can anyone give me some information on transmission temp gauges? I have a 91 Chevy van and we just got a 2005 Homestead Settler 285RSQB. My van has the towing package with a transmission cooler but I'm still worried about putting too much on it, especially when we hit the mountains. I'm thinking it's probably OK but a guage would put my mind at ease. Which type is better, electric with a sender or mechanical? My husband is a pretty good mechanic, are these relatively easy to install?