a stack a plate is, but i dont believe that it is true that trannys make the most heat when sitting still and jockying around.

they get fried under highway conditions. the max heat is while driving down the highway pushing a lot of air around the boxy shapes of the rv. if you are pulling a small trailer like a flat bed you prob dont need an aux cooler. but they never will hurt you unless the lines leak and you lose all fluid.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.