I have a 2011 Dodge Ram 1500, Hemi, with 3.92 Posi Rear Axle. In any gear, at partial throttle, it sounds like a Bearing Noise. Let me be specific. The type of Bearing noise you hear when a Bearing is gone in a Front Wheel when you turn, an Altenator Bearing, A Crankshaft Thrust Bearing Etc...
You let off the Gas and it goes away. 5th, 4th or any gear. ECO off or on. You can feel in threw the seat of your Pants and threw the Gas pedal. If you depress the Pedal it will downshift and go away. Only at partial throttle. I am running the correct Fuel and the Truck has 300 miles on it. The Dealer told me it was the ECO system. I said I pressed the Button on the Shifter and turned it off and its there no matter what. He said drive it for 5000 miles. I owned a Speed Shop for 13 years and have built many Race Engines and repaired many Cars. Sounds like something is wrong to me. Your help would be appreciated....Thank you, JD

 

Mine's doing that too!

 

I would try dealer again, they just posted a recall for the rear end / axles?? Best of luck to ya..

 

Moving this to 4th gen Ram, you'll get more answers here.

 

Thank you for the info. The Dealer said I have to give it 750 Miles, they have to allow for Torque Converter break in. I also had Him run my Vin # for recalls. none yet. Maybe I'll get lucky on that one.
JD Houghton

 

The Dealer heard the noise, but did not know what it was. They called Dodge and created a case #... Dodge called back in a few days and said they are aware of the problem and are working on a fix. May be a ECM Flash or a New Converter.
There was also a Rapid Response out on my 2011 Differential. They had to Ad 18 ounces of extra Gear Oil and some Posi Additive. Apparently they want it overfilled, there could be a Pinion Bearing issue down the Road. I was told that by another Dealer. Should of kept my 2000. At least I knew where I stood.

 

I'm having the same noise in my '11 with 3.92 gears. I'll take it in when I find some time

 

That issue sounds alot like the "drone" / "shudder" issue that the 09's up are having. mine does this as well, specially under a light load / light acceleration. Might be wrong, but the it's hard to describe the issues exactly with words. The one common thing is that all the trucks that have an issue are noticing it under the light load condition before the engine gets up in the torque curve.... I'll be watching...

 

I've had my 2011 in twice for that. Only difference is I never hear it when MDS is on, just when you have a slight acceleration or are climbing an incline. They called and told me it was normal for the 2011, to which I called BS. They told me that I was welcome to come and drive any other 2011 on the lot, so I went in a chose the GM's truck. Drove it and it does make the same noise. Doesn't sound right to me, but if they are all making the same noise, then I suppose it is normal. Now if it's something that is abnormal, but occurs in all 2011's, I'm layig odds that Chrysler will look pretty heavily at the cost of fixing it vs not...

I prefer to think of it as a "purr"....

 

My 09 does the same thing. I'm guessing it's something like a loose exhaust heat shield or similar.