Originally Posted by Joey Stalloney

No valve. And I strongly suspect this was designed to run ext cooler only (see my response above). Has 230k and still running strong (knock on wood), and I rarely run in temps far below freezing, so think I'll just leave it as is.

Originally Posted by Joey Stalloney

The mopar parts manual shows only 2 options for the cooler lines. These are presumably for external cooler or internal cooler. Image search for part #s confirms they are long, trans to cooler lines. If the external cooler were run in conjunction with an internal cooler from the factory there would be a short line that ran from internal to external cooler listed--there is none. Furthermore, an examination of my current lines shows what appears to be prefabricated lines that go directly from trans to external cooler. Both lines are different, with different prefab bends and length, and both fit precisely. Neither of the lines would properly mount to either port of the internal cooler. IOW, these lines were designed to take fluid from trans to ext cooler and back with no provision for routing to internal cooler. It appears at least 2004 models were designed to run either internal or external coolers, not both. I suppose it's possible that the parts manual is not completely inclusive and some were shipped with both coolers utilized, but it certainly doesn't appear to be the norm.

Originally Posted by Dodgevity

... I'll take a look at the truck soon but might not be able to see much. As you can see, there are plastic covers over the lines up front....

Originally Posted by Joey Stalloney

please do take a look, I'm curious if you're using both and if the lines/routing all look OEM, thank you.

Originally Posted by Dodgevity

I can assure you it's all OEM. I didn't even have to go look. Old pic of mine with the shroud removed.

Originally Posted by Joey Stalloney

thanks so much. Parts catalog is so unclear as to what lines go with what options. Diagram shows short lower tube from ext cooler-- is there a junction where it joins longer tube that heads back to trans? Most of the cooler tubes are discontinued anyway...

Originally Posted by Dodgevity

Not sure I understand your issue. Go look at your current rad and see if the lines are there, which I'm pretty certain they will be. The shroud will cover things but you can figure it out. When you buy the new rad, hook em up.

Originally Posted by Joey Stalloney

My current setup uses the external cooler only. I'll probably have to cut at least one of the lines and cobble the rest together with fittings and rubber hose.

Originally Posted by Dodgevity

That's really strange as your build sheet says heavy duty cooling, which is the same setup I've got. You've got tow package as well, right? Are the radiator cooler connections left open or blocked off? Any pics?

Originally Posted by Joey Stalloney

Even stranger, the mopar parts manual lists the cooler kit (under GROUP 001) as "Without Heavy Duty Cooling."
Yeah, tow package. Radiator ports were just left open. Radiator is out, but I'll get pics of the oil cooler and lines.