Being a new owner (ISM), I'm in need of some schooling. This has to do with the transmission overheating described in my earlier subject: "Bought the Coach", but I felt this needed to be a separate discussion. I've identified the coolant radiator as being the outboard cooler. There is a smaller "radiator" sandwiched between the radiator and another large one (presumably the tranny cooler) and then there is a cylinder (6"x22") just inboard of that that has large dia. hoses attached to the transmission. In my previous experience, the large cooler with fins, attached to the radiator was the transmission cooler and I am assuming that this is also the case. What is the cylinder and how does it relate to the cooler with fins? To be able to discuss this, I need to get the nomenclature right.
Thanks for any help.
The cylinder is your trans cooler. The smaller one is a fuel cooler. Someone with your model can better identify yours On mine outboard is fuel cooler then air cooler the one next to the fans is my radiator.
Howdy Sven,
As Craneman indicated, the cylinder is transmission cooler. From outside in towards engine its, fuel cooler, CAC, the engine coolant radiator. I'll attach a photo with grill removed, the small radiator is fuel cooler, the large radiator is CAC, then inboard not in picture is coolant radiator.
Love your coach, a mid-entry is a real unicorn in the unicoach world.
Dave A
Add hydraulic cooler between CAC and Radiator.
Thanks craneman, completely overlooked the hydraulic cooler.
Dave A
I learned from an Allison service manager, that the transmission computer will shut off the retarder if it gets too hot to protect the transmission. He pointed to a lot full of city vehicles, most he said with retarders. He went on to say, they are never here for transmission issues.
Too many dang coolers to keep up with, but the fog is starting to lift. From the photo, I understand that the large "radiator" that we can see from the street is the CAC (charged air cooler) which cools the intake manifold air. The cylinder is a heat exchanger through which passes coolant and ATF, with a metal tube separating them. The fans are attached to the coolant radiator, which looks like the transmission coolers I've seen in the past.
Has anyone used Loctite Extend for dealing with surface rust?
Thanks again for the effort in educating me.