Finally got my truck back. It took awhile to order the part so this must be a rare occurance. The tech seemed puzzled as to where it rubbed through. It was the line that goes to the radiator on the drivers side. I don't know if that is the supply or the return. How can you tell? I didn't dig into it too deep but it looks as though there is some kind of grommet or holder there just like wsquaredodie said. I don't have an aux cooler just stock.

Everything seems to be running fine but the check engine light came on this morning. I don't know if it is related. I'll pull the codes and see what comes up.

I checked the fluid level in the trans and it seems to be way overfilled. This is the second time that a dealer has overfilled the transmission. When I do a drain and refill it comes out pretty close to what the manual says. I'm going to check it again and if it is high I'll have to drain a qt or two.

Thanks for the replies.