I have installed two exhuast brakes on the 06 Dodges, both brakes are BD Engine Brakes. I had to install two wires into the ECM (same as any other brake install on a 06) and hook up the rest of the wiring. Dodge has the ECM programming done right. It is one slick set up. Once the brake switch is turned on it "arms" the system. The brake comes on for warm up. The transmission will down shift from OD to Direct. As it down shifts it drops the brake, then the convertor, burps the throttle to raise rpm to match engine to TC speed then relocks the TC and applys the brake. This down shift happens all within a second. You can also manually down shift from OD to Direct at a higher road speed and it does the same shift logic. You can pull it into second gear and it also holds the brake. The other nice thing is the brake works with cruise control. As the vehicle speed gets to fast it will apply the brake also. The brake turns off also when you slow below 10 mph.
Malcolm
Malcolm