Can anyone out there give me some insight on the possible cause of diff noise?At about 48000 the rear end (or so it seems)started making a "whirring" sound when you let off the accelerator(coasting). One day after a 60 mile drive I was going around a right hand curve in the road and a terrible (playing card in a bicycle wheel sound) that was loud enough to scare me a little. I pulled quickly to the shoulder and got out to see if something was caught in the wheel. I got back in and it has never done it again. I have 63500 on the truck and the noise has not gotten any worse. When I back out of the drive(turn wheels left) and( turn wheels right) to head up the street it acts like a spool. It doesn't twist up that bad but you can hear the tires fighting the pavement. It makes kind of a groaning sound but can't tell if it's the diff. or the tires barking. I called the dealer and of coarse I got the defensive. He told me if I hadn't had the rear serviced every 25000 the warranty might not cover. There are two service charts in my owners manuel and one says nothing of servicing diff at 25000 and the other is severe duty which does have diff service schedule. This truck has pulled a small trailer 5 times, 4 wheel used very little, and my wife drives it about20 miles a day in town and it usually gets40 hiway miles on the weekend.

 

On my 2006 Ram 1500 5.7Hemi soon after I bought it around three years ago, I started hearing a noise from the read end when I accelerated out of a corner from a stop.
Thought it might be the brake calipers, etc...Checked them, & OK.
Anyway, I met some guy at the pet store, he said he was a mechanic with tons of Dodge experience. I asked him about the noise and he interrupted me and told me what it was. He said that it was a small $5 clip that held the gears in the housing that will come loose after a while. If you re-adjust the clip or just replace it, he said no sweat! If you wait until the gears come completely loose, it will grind the crap out of your read-end.
I haven't tried this yet, but it sure sounded right!
When I do try it within the next couple weeks, I will report..