I just ordered the tranny cooler from dieselsite.com and had one question, Did you guys take the oem tranny cooler off or did you run it inline with the trucool. Any body have any pics of the install to give me a better idea? Thanks

 

I don't have the Trucool brand, but the aftermarket one I installed was put in series after the factory one. I don't see why you wouldn't put the Trucool in series after the factory one also.
Joe

 

6.0 unit is a direct bolt on and is bigger

 

Yep - I put my Tru-Cool in-line with the stock cooler. Definitely don't take the stocker out - like Joe-M said - run 'em together