Crawling around under my still pristine 2500 this afternoon, I saw this up on the driver's side. It seems to have transmission lines going to it. Is it some type of cooler?

Thanks,
David

 

Wider angle.

 

that looks like the tranny cooler they had to replace on My '03 for the C-44 recall.

 

That's the water-to-oil transmission heat exchanger, standard on all diesel trucks. Hot tranny fluid flows through this first, then on to the air-to-oil cooler in front of the radiator, then back to the transmission.

It's also the fluid resevoir that's just waiting to dump about a half-gallon of ATF all over you when you go to change out your tranny line for one with a temperature port. Not that I have any direct evidence of this, or anything...

 

Thanks! I knew it was something I hadn't seen on my gassers. I'm new to diesels and I'm trying to learn more by rolling around underneath!

David

 

Only the autos have that cooler.