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You may be able to use a Scangauge II to show trans fluid temperature. It worked on both of my 4runners and it works on my Suburban.
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Much easier than installing a gauge - just plug it into the OBD-II port. There are other OBD-II port readers that will show trans temp as well. Some of them will send the info to your smartphone.
Martin
If you love your freedom, thank a veteran. If you love to party, thank the Beastie Boys. They fought for that right.
David - CS, CO feedback
It's a measure of the civility in this country that no ones seems to fear constantly pissing off the people who own lots of guns.