I was thinking of mounting the sensor right next to the tranny cooler.  Would this be accurate enough or should I go as close to the tranny as possible.

Best bet is to place it in a line in the direction of fluid exiting the tranny, so you can capture the temperature of the hottest fluid.  Might have to do some experimenting or research to determine which lines pass fluid in which direction.  I can think of at least 1 method I won't recommend which involves temporarily disconnecting the lines to determine which one blasts fluid..

Quote from: TookyCatI can think of at least 1 method I won't recommend which involves temporarily disconnecting the lines to determine which one blasts fluid..

:rofl:  I did that once when I was 16 years old with a 1979 Malibu Classic I had!!! :rofl:

http://hp.autometer.com/instructions/006157_instruction.pdf

Hey thanks for that link.  This post is old  :lol: , but I still haven't gotten around to hooking up the gauge.