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Old 02-18-2014, 01:08 PM   #1
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Bearings or Brakes?

Hey guys, running into a problem with my 96 GT (160k) and i need some insight. about a week ago I noticed that the car had a deep howling/rubbing sound coming from the front end, so first I changed the LF hub assembly. The noise went away, but then came back a few days later, only not as loud. So I ended up replacing the RF hub as well and noticed the noise was still there. Thinking I had purchased a bad hub, i exchanged it at the parts store, slapped the new one on, torqued it down, and I still heard the noise.

Later on that day, i had my buddy drive while i sat in the back seat and, it sounds like the noise is actually coming from some where in the rear. It honestly sounds like its coming more so from the RR, but sometimes pinpointing the exact location of an external noise from inside the cab can be pretty difficult.

Now, the noise is only heard when I take off from a complete stop btwn 5-15 mph, but will go away once i apply the brake (which were changed 3 wks ago). It can also be heard once i get up around 40-60 mph; but once again,the noise will go away as long as the brake pedal is applied. While gently weaving back and forth on an empty road last night, i also noticed the noise would go away when weaving to the right.

Any idea whats going on here as i venture to the rear now? What should i keep an eye out for?
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Old 02-18-2014, 01:45 PM   #2
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Possibly a bad axle bearing. Very common on the 8.8 rearend.
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Old 02-18-2014, 02:42 PM   #3
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Well if the brakes haven't been changed in awhile now is the prime time to do them. Even if they are recent the slide pins in the calipers can stick among other things. Also using ****ty quality rotors like duracrap from Autozone can cause issues like this. I'm having a similar issue with my rear and I'm doing the back brakes again. Mine only happens from startup when cold though. After I get the components warmed up its dead silent which leads me to believe its a sticky caliper or something but you never know. If its axle bearings then that will be a nice little spring project...
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Old 02-18-2014, 03:07 PM   #4
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Thanks for the response guys. Yeah, I changed the brakes a few weeks ago so they should still be fairly fresh. I'll look into that first, and then quite naturally look into yanking the bearings out. I probably wont get around to that until Saturday (work schedule), but I'll be sure to post my progress. Thanks again!
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Old 02-18-2014, 04:56 PM   #5
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I had a similar situation and it turned out to be the carrier bearing. If you are replacing bearings at all in the rear I would suggest while you have it apart do them all.
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