Unabashedpraise
Newbie
If it was mine I would get it up on jack stands and put it in gear and run it to pinpoint the noise. Impossible to diagnose over the internet or phone. A million people will tell you what's wrong without actually having any idea. I'm definitely not going to advise you to throw parts at it or tear the entire truck apart. Just going to take some trouble shooting.
Sometimes the backing plate (dust sheild?) on the brakes rusts through and gets too close to rotating bits and makes scary sounds, probably only applicable to disc brakes though.The noise is a low scraping/scuffing noise. Not a whine or whirr. I can't hear it over 35-40 mph due to wind noise. Very obvious at lower speeds with the windows down. It is audible under all acceleration and deceleration. While coasting on flat roadway it is very faint, or I'm unable to hear it. Noise is only there while moving, not subject to RPM, happens in all gears. Gets louder when I downshift, I think because it the is more of a load on the drivetrain.
I plan on checking the fluid and gears tomorrow. I'm trying to get our house sold, so it's been on the back burner.
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I did the same oil cooler lines and and gaskets at the block on my s10 Blazer. What a pain that was to work on. Drivetrain from full size truck shoehorned into a compact chassis.
I honestly thought it was the backing plate. I took a flapper wheel to the drums and plate. Maybe I'll try a bit more. I didn't have exactly what I needed before. In fact, maybe this calls for a bit of big freaking [emoji375].
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Did some checking on the rear end. Jacked up the rear end, took the cover off and turned the tires, driveshaft, and even put it in gear.
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When the gears spin, there is a slight scuffing noise and it seems to bind a little. It will spin easily until it hits the same spot. Then it takes more force, moves through the bind, then spins easily again.
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Here is a link to a video. Everytime it stopped or slowed,I was hitting the point where it binds up. Except when the car drove by...
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