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rear end noise
PostPosted: Sat Mar 26, 2011 2:59 pm Reply with quote
Flanny
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Joined: 20 Feb 2011
Posts: 22
Location: Greenville, sc




I just bought a 99' Z28 that was making a noise in the rear end at all speeds acceleration and deceleration. such a loud noise that i couldn't tell exactly where it was coming from by using a stethoscope...sooo, i pulled the diff cover and removed the brakes/rotors. i can turn the axles with my hand while the car is in neutral and it sounds like it's coming from the diff, not the outer axle bearings as i suspected.

so, my question is...what bearings am i looking to replace? carrier? if so, how ridiculous is that to do?

here's a vid of the noise...
http://www.youtube.com/watch?v=JtENbEhdq3Q

or is this normal to hear when have the cover off and no fluid?

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PostPosted: Sat Mar 26, 2011 4:41 pm Reply with quote
Diggler
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Joined: 23 Feb 2006
Posts: 9067
Location: upstate




the only bearings turning in your vid is the axle bearings out at the ends of the axle tubes.

maybe a vid while driving would be better?

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PostPosted: Sat Mar 26, 2011 6:16 pm Reply with quote
Flanny
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Joined: 20 Feb 2011
Posts: 22
Location: Greenville, sc




that's what i thought a few minutes after i posted...so the noise from the spider gears is probably normal since the cover is off and there's no fluid? or maybe it sounds like it's coming from them, but it's just the noise going through the axle tube...?

we had it on the lift at my work before i bought it and used the stethoscope while the the car was held at 30mph...noise seemed to be more around the axle bearings than the carrier, but it was so hard to tell because whatever it is, it's extremely worn out, lol. i've got some repair bearings...i'll throw those in, and if it doesn't fix it, i'll take it to a known good rear end guy.

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95' Civic, the gas sipper
99' Z28, working on it...
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PostPosted: Sat Mar 26, 2011 11:15 pm Reply with quote
roadconetuning
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Joined: 18 Sep 2006
Posts: 13368
Location: Upstate, SC




those 10 bolts blow up for no reason... pick up a spare for 200 bucks and throw it in.

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PostPosted: Mon Mar 28, 2011 11:37 am Reply with quote
Flanny
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Joined: 20 Feb 2011
Posts: 22
Location: Greenville, sc




on the lookout for one...axle bearings made the rumbling noise better, but i'm hearing a whining noise now...blah.

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99' Z28, working on it...
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PostPosted: Mon Mar 28, 2011 12:30 pm Reply with quote
ElecTech
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Joined: 03 Sep 2007
Posts: 425
Location: Charleston, SC




Pinion bearing, most likely.

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PostPosted: Wed Mar 30, 2011 4:00 pm Reply with quote
Mr.Goodwrench
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Joined: 10 Dec 2008
Posts: 22
Location: GC




ElecTech wrote:
Pinion bearing, most likely.



Yup, exactly what i was gunna say. Had the samething happen on my 2002 shortly after i PCS'd (moved) here to charleston. Was the only thing i could think it could be. Whats the mileage like on the car? my case was because the cars was a garage queen....well still kinda is and with that said with low mileage the pinion bearing can get pitted(the bearing race), thus early failure. Is it like a metal on metal sound consrant with thw vehicle in motion?

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rear end noise
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