[GhettoPop]

stock t-stat is 190 or 192. i had a robertshaw high flow 180 t-stat, it had three holes in it. my stock engine would not even reach operating temp with it! i dont think its the cause of your problem, but might be an easy solution.

yes water should cool, better than 50/50, but will not lubricate the water pump and stop corrosion in the system. i really suggest a 70/30water or 80/20water and a bottle of water wetter, its good stuff, read the directions.

fill the cooling system as stangracer 20 described, sounded on point.

the fan clutch could be warn out, try spinning the fan by hand with the engine off, the fan should stop as soon as u let go. if it continues to spin, your fan clutch is beat.

i would not stack the coolers. an electric pusher fan mounted in front of the coolers would solve all your problems.

why do u need 2 tranny coolers anyways? why not just get one large one with its own electric fan and you can mount is anywhere! best solution IMO if you really want a lot of cooling. don't overcool your tranny, it too needs to be a the right operating temp. w/o a trans temp gauge, u might be overcooling your tranny fluid and do damage w/o even knowing it!