I rigged the fan to stay on by grounding the thin green wire on the #8 relay (the one most towards the drivers side, the last relay in the row) Thats it. Now everytime I turn my ignition key my fans come on. Keeps my engine at 180 to 185 at all times. Worked great for me!!

Now imagine wiring that up to a switch. Position one would be 'normal' operation, position 2 would be grounded. That way on cold winter days, your fan isn't running unless you want it to.

So where do you mount the other fan for dual tranny coolers?? Mount them in tandem??

Mount the other fan? You don't add a fan for the other tranny cooler. Driving will cool it, or the existing fans.

In your sig, it mentions "dual tranny coolers". What does that mean?

I have the stock GM tranny cooler that shipped on the car from the factory.....and right in front of that, I have another tranny cooler. Fluid goes through the front one, then the stocker, then the radiator before going back to the trans.

As soon as I get time I want to wire two switches in the car, one for the high speed and one for the low speed, when bother are off it will be in normal mode then all I have to do is hit one of the switches to cool further. I will get to this someday.

can the wirimng be easy reversed for cold months?

Yeah, I guess the easiest way would be to run one wire and splice it onto the green wire on the #8 relay then run this wire to one terminal of the switch then ground the other terminal of the switch. . That a way when you have this switch in the on position your fans will come on as soon as you turn the ignition key on, and when its in the off position the fans will come on when they always have around 195 to 210 (this is when mine turned on). Or you can run a switch for the low speed (#8 Relay, Ground Dark Green Wire) and a switch for the high speed (#7 Relay, Ground Dark Blue wire). This is what I plan to do. I am no in any hurry to do this because I like my fans on all the time to keep things cool all the time.

P.*. Please Excuse my bad spelling and grammar, I type faster than I can think!!