Originally Posted by Wallaby Dan
The only issue i had was the engine temps are 195f. its really not good for a transmission to have that high a work temp. Mine is with its own trans cooler and not connected to the radiator. It runs around 140 pulling hard and 105 when not. My fluid is still pink and no smell of burn at all. Transmission shifts perfect cold or hot. No issues! This spring i will change the filter and fluid in the transmission. First time in three years!
195F is not too high of a temperature for a transmission, that's still within the normal working temp.
You don't need to worried until you get into the 210-220 and no sign of decreasing and under a heavy pull.
Using the factory heat exchanger in your line after the aux cooler you're installing is actually a better way to go, because it will bring your trans fluid up to proper operating temperature faster, and that's also important for proper lubrication of your trans, which helps to decrease friction, in turn providing you a little better fuel mileage.
The aux cooler first in the out put side of your trans will be very beneficial decreasing the hot fluid leaving your trans before the heat is transferred to your cooling system, giving you longer up hill pull time before the temps rise to an uncomfortable level, if they ever do.
But answering your question as to if taking the factory cooler out of the line completely will hurt anything, no it will not.