Nice choice on the truck and the gauge set up. Unlike boost and EGT, there is no need to have the transmission temp at eye level. You have the electronic xfer case, so this will also work for you. I mounted my Westach below the cigarette lighter in the center recess. There is a pre-cut square hole there to feed your wires. Geno's sells a black rubber underdash gauge mount that that fits perfectly in this space. It doesn't look like it, but there is enough space on the driver side of the hole to mount the holder. If I can get you a pic I'll follow up. I opted for the the dipstick sensor so I could avoid dropping the transmission pan. The dipstick sensor also makes it easy to change of you need to. I'll order a 1/8 NPT sensor to have on hand should I decide to go to another location. I also have a B&M drain plug waiting in the wings. After I installed the gauge I had a brain storm. Why didn't you install the dual temp gauge? With this you can get a reading from cooler line and pan (settles all arguments) or add coolant temp reading. As info feeway driving: I'm seeing 125 deg in cooler weather, 150 deg at 80 deg ambient. Loaded I'm seeing 175-180 deg, but this was in cooler weather. If I run the A/C the temp goes up about 10 deg or so because the a/c condenser is forward of all the other coolers (intercooler, transmission cooler, power steering cooler, radiator)