I installed my t-cooler in front of the radiator before I realized it was not the best place for it. I know every one else installs them there but it’s not good for the A/C or engine cooling system.

The job of the add on cooler is to help dissipate heat but why put this additional heat in front of the radiator and in front of the air conditioning condenser?

Most modern vehicles are operating at temperatures over two hundred degrees and are being taxed to handle the added heat of transmissions under a heavy load. So in many cases the oil is going back into the transmission too hot. The life of the automatic transmission relies on the life of the oil and the additives in the oil and heat shortens the life of the oil and the additives in them.
... Add on coolers should be used as pre-coolers in series with the cooling core in the radiator. An after-cooler would cool the transmission oil better but still put too much heat into the engine coolant as well as be too cool in the winter.

TIP: I have noticed many stock cooling lines need to be insulated from headers and pipes.... I shielded my cooling lines with a scrap piece of aluminum.

... First look for a mounting place away from the exhaust system. Look for mounting places under the bed. The cooler will dissipate a lot of heat even without much air flow because the oil will be VERY hot when the transmission is under a load. For HD towing a small 12 volt fan could be installed.

... On top of many front skid plates are good mounting spots. Mount the cooler in the hot out-put line between the transmission and radiator and it and it will be a pre-cooler. I used a clear piece of hose connected to the in and out cooling lines to find out which was which. After connecting the clear hose have someone start the engine while you watch to see which way the bubbles flow to tell which line is which.

The Pre Cooler will reduce the frequency of needed automatic transmission fluid changes.

... I mounted my pre-cooler to the top of the front skid shield (passenger side behind the radiator) on my wife’s V-8 ‘99 Grand Cherokee. I noticed later there was a nice safe place under the body behind the drivers seat.