One of the values I have displayed on the scangauge is TC lockup. It's only in 5th and 6th gears. On the climb to my house which is about 3 miles at an average of about 8% (with some much steeper pitches) and a lot of tight turns it never gets to 5th or lockup if I leave it in drive, and I...
I have a Scangauge III in my GX, monitoring trans temp among other things. I have used a Scangauge II for that in other vehicles.
It's only been a couple months and in winter but so far I have been pleased with the stock trans cooling. On my Eurovan the stock system would have the trans temp...