Installing an after market tranny cooler is as simple as removing and re-attaching a couple hoses (may involve cutting hard lines). The heardest part is determing which line feeds the cooler, which is the return line. (run the truck the hotter of the two lines feeds the cooler, the cooler one returns to the tranny) You'll need that, BECAUSE............
The debate starts when you research whether or not the additional cooler should be placed BEFORE or AFTER original. Lots of opinions on goggle, either way has the fluid going BACK to the tranny COOLER.
If memory serves me correctly (been a few years---I am getting forgetful)...I installed mine on the old truck directly to the feed coming FROM the tranny. That way the hot fluid was pre-cooled by the additional cooler, before running through the built-in radiator cooler.
