@
mtbtim
Any luck with your truck Tim?
I’ve been thinking about yours while working on mine.
Your thermostat may be sticking or not opening fully.
I threw a 170* in mine.
And added a trans cooler + 6qt drain and fill.
I baselined the following results on a road that gains 1000’ in altitude in less than 3 miles at 7%-12% grades.
Baseline run ~25 mph +-
2nd gear mostly
All temps measured at the summit.
Here’s the same run with a new thermostat
And with the trans cooler added in line and drain and fill
The temperature relationship between the coolant and transmission fluid is interesting.
Good luck. I’m watching to see what you figure out.