Rear End Noise!!

[silverado19]

I am hearing a noise from the rear end, mostly when I turn left. I have a 2001 Chevy Tahoe 2wd w/ the G80. It sounds like a metal scrapping noise. I can get it to make the noise turning right as well. It also sometimes makes the noise when I am going straight and turn the wheel from left to right quickly. It almost seems as if the G80 is making the noise as one wheel turns faster/slower than the other.

 

The G80 has been serviced (Redline fliud w/ additive) and I did not notice any metal shavings or anything else wrong. I added the additive after calling two service departments with both recommending the additive.

 

Is it the bearings, ujoints, break noise or something in the housing?

 

Any help/ideas/suggestions would be great.

 

Mark

[az'03Silverado]

When I saw the topic title I thought this topic may be discussed on the WebMD Gastroenterology forum until I read the post. But as far as your differential, I have no idea what could be causing the noise.

[snoman]

I am hearing a noise from the rear end, mostly when I turn left.  I have a 2001 Chevy Tahoe 2wd w/ the G80.  It sounds like a metal scrapping noise.  I can get it to make the noise turning right as well.  It also sometimes makes the noise when I am going straight and turn the wheel from left to right quickly.  It almost seems as if the G80 is making the noise as one wheel turns faster/slower than the other. 

 

The G80 has been serviced (Redline fliud w/ additive) and I did not notice any metal shavings or anything else wrong.  I added the additive after calling two service departments with both recommending the additive. 

 

Is it the bearings, ujoints, break noise or something in the housing? 

 

Any help/ideas/suggestions would be great.

 

Mark

 

<{POST_SNAPBACK}>

 

 

 

It tends to suggest a malfuction in the differentail and possibly the linings are worn off of the clutches and you are hearing metal again metal in a turn. The G80 in a 10 bolt is not that strong and not known for long life in hard use or with big rubber, I teardown inspection is warranted because you want to fix it before possible filing from this condition damages ring gear or bearings in diff.

[silverado19]

SNOMAN, thanks for the tip. Any other ideas? Is the job you describe something I can do myself? Part numbers?

 

Mark

[snoman]

SNOMAN, thanks for the tip.  Any other ideas?  Is the job you describe something I can do myself?  Part numbers?

 

Mark 

 

<{POST_SNAPBACK}>

 

 

 

 

Depending how adept you are because you have got to pull the pig to inspect it. You can remove it by jacking up complete rear axle, drain oil from it and removing cover and removing the spider gear crosshaft and then push in each axle enough to remoce c clip retainer for axles then sliding them out enough to remove pig after removing carrier bearing saddle bolts to remove then tear down and inspect the differentail "pig". As long as you replace and reuse the carrier bearings and shims the same as they were, your preload and backlash will be unchange after you repair diff. If you actually change diff carrier then you will have to resetup the rear end backlash and preload which if done wrong can make gears noisy. Did I confuse or scare you out of doing it?