slow grind?

[hpcbmw]

I've got a 2000 f250 4x4 with 145k miles, that's pretty new to me. I was driving very slowly (3-5 mph) the other day and heard/felt slow grind or binding. Not sure, but it felt like it was coming from the rear of the truck. Any ideas where to start looking? U joints? axle fluid?

Thanks

[CakeEater]

What came of the noise? I'm experiencing something similar.

[hpcbmw]

I climbed all around the the undercarriage, pulling, pushing, etc. I put the rear wheels on jack stands and idled the truck in gear while under the truck listening for noises, and I heard nothing.

I had a 500 lb motorcycle in the bed when I heard the noise, but empty when I checked it. I haven't been able to replicate the noise since. I changed out the rear diff fluid and the transfer case fluid the other day, both were in ok shape.

I'm loading more bikes this afternoon. I'll see if the sound comes back with a little weight in it.

Any luck on yours?

[CakeEater]

I just located the source of my angst. The bushing for my right rear shock wore out. It allowed the shock to rub against the exhaust and fuel tank. I pulled the rear shocks and I'm looking to replace all 4 with Bilsteins. Some one posted a similar problem and they recommended to check all bushings.

[hpcbmw]

Thanks for the update Cake. I didn't notice any issues with mine this weekend, but will take a look at the shock bushings next time i'm under there.