Originally Posted by 713Diesel
Are you experiencing overheating? I have never seen my trans gauge move past the spot it gets after getting up to operating temp. I have 37's and have towed some pretty good weight in some pretty hilly terrain with the Spartan 275 tune and like I said before the gauge stays in the dead middle like it always does. Is this gauge one of those "dummy" gauges? I did switch the ATF to Amsoil so that might help a little.
I pull a 14k 5th wheel and live in upstate new york, so long steep hills in the Adirondacks and Green moutains of vermont tend to make trans temp skyrocket once the converter unlocks at slower speeds. The factory trans temp gauge doesnt move until about 220F. And the fan doesnt kick in until about that temp also. For a short time I have seen 240 when climbing up in to Lake Placid. I plan on mounting the cooler under the truck , possibly between the rt side rocker and frame or under the bed. Also wiring the fan to the upfitter switches for intermittent on demand operation. Let me know if anyone has any mounting ideas or pics of installs. JIM