Which Line is Transmission Return Line on 2007 Dodge Caravan 3.3 l

Question:

I purchased a Derale D13503 for my 2007 Dodge Caravan, 3.3 litre engine. I did watch your video for installation and found it helpful. The video shows the technician removing the lower transmission line on the foctory cooler. I thought the return line was the upper line. Which is correct? Also, should I use the insta-dapt 13004 and connect it to the radiator or follow the video and not use it?

asked by: Pete G

Expert Reply:

An easy way to determine which line is the return line is to run the vehicle for a few minutes and then feel which of the 2 lines is cooler. The cooler line should be the return line.

I contacted our representative at Derale and he informed me that the Insta-dapt radiator adapter is not required for installation on your 2007 Caravan.

I have linked a video installation of another model Derale Transmission Cooler being installed on a 2007 Dodge Ram Caravan and an FAQ on transmission coolers.

expert reply by: Reno H