Typical cooler will lower the fluid temp anywhere from 80 to 140 deg in series with the radiator depending on the ambient temp/amount of air flow (vehicle speed)/gpm of fluid.....not hard to be "to cool" on a cold day
Agree a $50 guage is worth the money because ATF viscosity (thickness) is so sensitive to temp changes:
kenetic velocity@ 40*C (112F?)=36
kenetic velocity @ 100*C (212F)=7.5
(and now to prove I'm crazy)
Don't have a oil/tranny temp guage...use a turkey oven thermometer ($5?)...the trick was a hand full of plumbers putty and aluminum foil on the steel trans oil line to get a good "ballpark" reading....175*=beef well done!
xntrik, thanks, the bypass thermostat (on my xmas list) beats hell out of my 2 coolers in parallel in summer, 1 in the winter plumbing mess!
Last edited by red65mustang; 11-14-2005 at 08:46 AM.