It is a 18,000 GVW, I don't ever see you exceeding that, especially since you wont be towing every day. For installation, you want to keep the radiator cooler as well. If you look at it, you will find a line going from the transmission to the radiator. Then there will be another line from the radiator back to the transmission. You want to take the line that goes back to the transmission into the new cooler, then the other line from the new cooler back to the transmission. It comes with instructions, but here is a crude drawing:

 

Quick question: Why do lines run from the tranny to the radiator? How does this set-up not mix in coolant? Sorry for so many questions, I just like knowing how things work...

 

The radiator has a built in cooler, seperate from the coolant part of the radiator.

 

So the radiator already cools the tranny fluid, and this just supplements it? just tell me to be quiet..LOL

 

Yeah, the radiator cools it, but by adding an auxiliary cooler, you prevent the transmission from overheating while you are towing a load.

 

makes perfect sense...increase the load on the tranny=needs auxillary cooling. i may try to get that deeper pan, too, if it isn't too $$$. thanks for all of your tutoring...

 

No problem

 

I would argue you should run the hot line from the trans to the aux cooler, then from aux cooler to the rad cooler, then back to trans.
This way you don't over cool the trans (bad) and the engine can add some heat back into the fluid if driving in extreme cold. Very cold weather can cause trans fluid to gel in the lines and starve the trans. Damage can be extreme and very $$$

 

Great, confuse me just when I am understanding things...

 

I believe that is the way most factory systems run. Trans-aux cooler-rad cooler-back to trans.
The kits generally come with pretty good explanations for a diy install. Its about a 1 1/2 out of 5 for difficulty