scale of 1 to 10, its like a 3 the hardest part was the mounting of the cooler, u remove the factory section of rubber hose and then just hook it up like anyother cooler.... let me know if u need any other info
on the cooling advantages with out the fan of course there is, u have an extra cooler the fluid goes through and at high way speed that a ton of air
true, it would make sense to put it after because the aftermarket one will cool better anyway. what are normal coolant and trans. temps? i'm asking because it would suck if you put the aftermarket cooler before the stock one and have the aftermarket one do a good job cooling just to have the factory one heat it back up to whatever the coolant temp is.