Thanks for the good info. Looks like plenty of different tugs have it. Wish my Highlander had more than a light. I agree, I don't want to see that light at all.
The Jeep GC showed 170 degrees on the digital readout, just test driving around town. But you think that the on-board readout will not be accurate? I wonder how and why the mfrs would set it up to take measurements that are not accurate?
I took the HL in to the dealer (Fowler) and explained that I never used to have the light come on when towing, but on my July trip it came on several times. I asked them to look for reasons why it has changed. But I think the service advisor does not communicate things accurately to the mechanics, because the notes on my bill say,"No problems found. Light came on for safety of the trans. Getting too hot." Which tells me exactly squat. Duh, of course it's too hot! The question is WHY? Yet "no problems found." I think I have found one problem, though... the problem is the people at that dealership, I need to go to a different garage.
Question: has anyone ever compared their on-board tranny temp readout to a Scangauge or similar, to quantify how accurate or inaccurate the onboard readout was?