I just bought a 06 Ram 1500 Quad 5.7 all stock it only has 16000 miles on it. There is a noise when I am driving down the street with foot light on the gas. It happens at about 1300 RPM and somewhere around 40ish MPH. It is like a reverberation or very dull exhaust sound. Goes away if I let off the gas or if I apply more gas. I dont really notice a performace difference but I want to make sure it is nothing bad. If so I can still get the warranty to fix it. Thanks for any help and if I missed anything just let me know and I can try to add it.

 

prob mds kicking in

 

It sounds similar to what I had. It turned out to be bad rear differential gears. Dodge replaced them for free and all is well. When you are on the gas you don’t here it. It is when you are easy with the gas and the engine is not working hard when you here it. Red