Join Date: Feb 2014
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The Rear End Howl
I just bought the truck a few weeks ago. It's always had a howl in the rear end that is there pretty much at any speed and under any power conditions. The only thing I haven't tried is shutting off the truck while it's going down the road.
I did do a diff fluid change when I got it to see if that helped. It didn't. No shavings in the oil or in the bottom of the diff, just a lot of gray junk on the back of the fill plug.
I have replaced the calipers and pads because one side was significantly hotter than the other with the infrared thermometer.
When I have the back of the truck on the stands, I can spin either tire and I don't hear any howl or whine. The only noise is the occasional "tink" or "ching" which sounds like the pads hitting the rotors. I thought if it were a wheel bearing I'd hear the grinding doing this.
One thing I noticed that seemed funny was that when I turned the passenger side tire forward, nothing happened with the drivetrain. When it rotated it backward, it would make the driveshaft turn. Neither direction would make the driver's side tire rotate. When I rotate the driver's side tire in either direction it didn't make the driveshaft do anything and it didn't make the passenger side tire do anything.
Hopefully there's enough information there to get some suggestions.
Last edited by peteymit; 03-04-2014 at 02:06 PM.