Just took my longest trip since the diff cooler gauge install. Drove about 45min (80mph) 35 highway and 10-15 min side streets. It was a cold 50 degrees out and the whole time on the highway the diff never stopped rising in temp. It got to 194* before I pulled off. I'm going to have to take a longer trip to see if it goes higher. Interesting to see at such a low temp outside the diff gets so hot. I can't imagine a hot summer day on a race track. No wonder people don't like the OEM vlsd! If you could keep the diff temp at a constant lower temp I bet it performs well-er haha.
