215 F

[ralph]

hauling about 9k behind me up 6 and 7 % grades. dirt washboard roads. 20-40 mph. stock cooler. good or no?
if good, does that indicate healthy trans?

[Dave]

Is it staying there or cooling off right away. If its staying there its too hot. Flush and add a larger cooler

[7.3toyhauler]

Originally Posted by Dave

Is it staying there or cooling off right away. If its staying there its too hot. Flush and add a larger cooler

+1 bigger cooler will help a bunch mine struggles to get to 150f

[ralph]

ooops shoulda been in 99-03. no, doesnt stay but peaked. 190-200 is where it stayed.
teton nat forest. uphill. rutted dirt roads. what about this true-cool 40k cooler? i dont ever see mods coming. dont want a hot rod. dont want to burn my tranny either.
thanks for the input.