I have 2004 Dodge Durango hemi 5.7. Today I noticed that behind the rear passenger tire that it was leaking. I’ve never had a problem. It was clean but oily. I’ve never had a problem before.

 

the component in the picture is the rear air conditioning thermal expansion valve. the ac system does have a small amount of pag oil but it doesn look like refrigerant/pag oil. the fluid on it looks like brake fluid or super clean rear diff fluid.

 

How would I be able to tell if it’s the diff fuild. My brake fluid reservoir is full.ive never had this problem before as much as I have worked on my durango

 

It's dripping down FROM those pipes, not spraying up onto them. Look at the splash patter below it. Think I would be taking a peak at whats above there, and see if it isn't something INSIDE the truck leaking out. Also, Could it be coolant?? I would imagine there is a heater core back in that area as well.

 

Yea it’s dripping from the pipes. I do have a rear heater in my durango. But the heater has never worked since I got it. Just the a/c. The only thing above those pipes are for the heater/ac. I’m worried I don’t even want to drive it. I just put a new pcm in and are dying to get it back on the road

 

i think heyyou is correct. the tubes look to big to be ac...must be coolant.