I'm having trouble trying to figure out which transmission oil cooler lines to order. I have a '03 TB LT EXT with 4.2. Any help would be appreciated.

 

all of them.

get oem lines from the dealer. I have used dorman aftermarket lines in the past and they were a pain in the ***. they require you to use dorman clips that come with the lines. they are a pita to install. if you use the oem clips they install easily, but the dorman lines will pop out under pressure. Save yourself the frustration and buy the oem lines. there will be no confusion when ordering lines from the dealer. provide you vin and they will be correct.