[Hellz]

so here is the thing...

the viscosity of the fluid is going to warm up to whatever it is going to warm up at splashing around in the tranny and cycling through it.

Is that 60 degrees? 70, 80 or 90 degrees? not sure.

your cooler is going to cool at most to the ambient air temp outside.
there is no way it can go lower than that unless you have something else that is actively cooling.. I.E refrigerant type..

so the magical numbers are..
what is the oprating range the tranny needs ?
and ambient temps outside.


at most, the pump is the only thing that should really be affected by cooler fluid as it has to work a little bit harder.. but honestly, it will have minimum inpact