[RXT]

There were several transmission options left out of the conversation. Think of this, the Cummins is also used in the medium duty truck market, and that market allows customers to spec their trucks with a variety of engine and transmission options. This means you can take advantage of those options and get away from common difficulties of using Cummins specific Dodge transmissions. For automatics, Allison is the leading manufacturer of autos in the medium duty market. Not all of their transmissions are computer controlled and many of them can be found relatively inexpensively. There are more manual transmission options too. Eaton-Fuller, Clark, Road Ranger, etc are strong transmissions found behind the 5.9

The significant disadvantage of these transmissions is that none of them were designed to use a married transfer case, but you can use a divorced t-case

Ed

 

[RXT]

Right, no air brakes. No park either. It has another hydraulic system connected to the brakes that has something to do with the power and maybe the parking brake. There is a pull push knob on the dash for setting the brakes.

Anybody know what kind of braking system this it? What its called? I need to do some research on them.

OH, BTW, I am keeping the truck, shortening the frame and putting on a ford dually bed. LOL

Some medium duty trucks use an air over hydraulic system. Fully hydraulic systems will have some sort of mechanical parking brake. If its an automatic, look at the selector. If it has a "Park" position, the tranny is likly equipped with a parking pawl, like a typical automatic. If there isn't a park position on the selector. You use neutral, and you set the parking brake or pull the air valve. Some medium duty trucks have a drum brake either on the tailshaft or on the rear axle. It is the parking brake on hydraulic brake systems, but air systems and air over hydraulic use the service brakes for parking too. You can get by with almost any medium duty automatic, you'll just have to set the emergency brake, just as you would with a manual, when you park

Ed