i have hear that sound to when im sitting at a stop light but i have turned off the exhaust brake and it stops 08 dodge 2500 4x4 6.7 quad cab

 

Well, on mine, with the 5.9, I hear the sound you're are talking about, but what it actually is is the torque converter staying locked until it's about to stall the engine.

What I think you are hearing is the sound of thedriveline actually "turning" the engine, because the TC is locked.

Obviously, with the manual, you wouldn't hear it.

Try this....

Turn the exhaust brake off and drive your truck in Tow / Haul mode. Listen as you come to a stop, I bet you hear the same sound.

Between 1000 - 1300 RPM's is where you hear it.

 

i removed the elbow from the airbox and intake pipe. you will see a cross baffle wrapped in foam. grab it and pull, comes roght out. the baffle takes the intake pipe (5 or 6 inch diameter) and closes it down to 3 inches.

 

My Ram is been making that noise on and off, everything started when they replaced the turbo actuator. It can go for several days with no noise, but when you are at the stop or waiting at the drive thru, you can feel the engine like going in the exhaust brake stage and if you don’t switch to neutral the engine almost die for less than second and come back again. I also noticed the smell of partially burned diesel but no codes or nothing. Please any advise is appreciated.