Rotational scrapping sound when driving slow

[Happy Hummer]

06 Hummer H3 lux. 125k approximately

***All parts replaced with in last 20k miles or less***
Front hubs replaced last spring/summer...Shocks
All new parts up front (I.e. UCA, sway bar links, ball joints, brake pads, rotors, slide pins...etc.)
All new brake pads on back, sway bar links... Shocks
Many other items addressed as well. :giggle:

Today while driving noticed a rotational scrapping sound that both increases with RPM as well as goes away when at stop sign idle.
Only second time to hear this winter. Any thought's???

Any help would be appreciated.

Chris

 

[Bruces]

Likely a rotor or bearing in front hub. If front hub was not torqued to 191 ft/lbs it will wear out quickly

 

[4speedfunk]

Pry the backing plate away from the rotor. Rocks and debris likes to collect in there.


Sent from my iPhone using Tapatalk

 

[08H3]

If you used generic hubs, they're likely toast at 20K. If not that, my money is also on the rock caught behind the backing plate. Happens often for me. I also had the wear indicator on a break pad get bent once and make contact with the rotor. The pads were still fine, but somehow the indicator was bent.

 

[rascole]

Lift the front and rotate the tires by hand. I had a similar issue with the dust shield rubbing the rotor.

 

[alrock]

Does the sound increase with RPM or with wheel speed? For example, if you put get it up to 30 mph, put it in neutral, does the sound change? Or if you maintain 30 mph but in different gears (or rev in neutral) does the sound change? Your description leads to wheel rotation issues but leaves open the possibility of some drivetrain issues.

 

[Happy Hummer]

Timken hubs.
The sound is over taken by wind noise by 30 mph or more. Today the noise was not there.
Changed oil today. While doing so I took the time to look at u joints for tell tale signs of metal dust. Nope!
They looked nice and clean.
The rear pinion seal is weeping.
The CV shaft seals are damp. Not necessarily the cause but will be doing those this spring, summer.

 

[08H3]

Tickets should be fine. All the GM hubs I have ever bought have had Timken bearings.