I guess I should write up my transmission temperature gauge then. I installed it for exactly the same reasons that you listed. It *may* have helped me prevent transmission damage once, and has certainly helped me "sleep easier" especially when the transmission heated up that one time. I have since then installed a transmission cooler.
I'll work on a real writeup, but the hardest part of the install is mounting the gauge.

Mine was installed by hacking a Mustang II pod to fit the Trooper A-Pillar. They may make a pre-formed pod for your truck. I plumbed the sensor into the pressure line from the transmission. It is 1/8" npt, so a t-fitting and 2 appropriately sized barbed fittings and hose clamps finished off the plumbing. You can locate the host from the transmission by tracing the hard metal line that exist closest to the front of the transmission. The return line connects to the transmission further back in the vehicle.
While installing this, be VERY careful of leaks when doing this. A dry transmission will last far fewer miles than a hot transmission. This is also a good time to install a transmission cooler if you so desire. This would be plumbed into the return line for optimal performance. Also be sure to check and refill the transmission fluid after you are done with either of these procedures.
-Tad
I'll work on a real writeup, but the hardest part of the install is mounting the gauge.

Mine was installed by hacking a Mustang II pod to fit the Trooper A-Pillar. They may make a pre-formed pod for your truck. I plumbed the sensor into the pressure line from the transmission. It is 1/8" npt, so a t-fitting and 2 appropriately sized barbed fittings and hose clamps finished off the plumbing. You can locate the host from the transmission by tracing the hard metal line that exist closest to the front of the transmission. The return line connects to the transmission further back in the vehicle.
While installing this, be VERY careful of leaks when doing this. A dry transmission will last far fewer miles than a hot transmission. This is also a good time to install a transmission cooler if you so desire. This would be plumbed into the return line for optimal performance. Also be sure to check and refill the transmission fluid after you are done with either of these procedures.
-Tad