..isn't the trans cooler in the rad really a "heater"?
passing trans fluid through a 180 degree rad will warm it for cool weather operation and the experts i have talked to want your trans operating 170 - 190 degrees.
a big cooler not plumbed through the rad might keep the transmission t too cool?
i have a dynamic 9 1/2 converter and a 5 x 11 trans cooler and have
a hard time keeping the trans above 160.
...i should have run mine through the rad.