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Rear end whine

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Old 04-24-2018, 06:21 PM
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99blkfrc99
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Default Rear end whine

Gears 1-4 I can't hear it that much, but 5 and 6 you can hear it. Whines anytime on throttle. Goes away while coasting. Assuming it's pinion related? What do we have for options? All out with an RPM unit or does somebody rebuild? It's a 2000 so I think it's a 1 rib that I probably wouldn't re use anyways.
Old 04-25-2018, 05:56 PM
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99blkfrc99
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Any help? Thanks
Old 04-26-2018, 02:47 PM
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bobs77vet
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how fresh is the gear oil in it?
Old 04-26-2018, 04:44 PM
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99blkfrc99
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I just bought the car the other week so I'm not sure when it was serviced last.
Old 04-26-2018, 07:08 PM
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3sACROWD
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It may not be the rear end. Your transmission is also in the vivinity. If your tranny has a lot of highway miles you may have a shaft in the tranny that is worn and causing the whine. Call RPM or some other reputable shop and talk to their mechanic.
Old 04-27-2018, 11:03 AM
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Originally Posted by 3sACROWD
It may not be the rear end. Your transmission is also in the vivinity. If your tranny has a lot of highway miles you may have a shaft in the tranny that is worn and causing the whine. Call RPM or some other reputable shop and talk to their mechanic.
OR, a wheel bearing that is going/gone south.
Old 04-27-2018, 12:15 PM
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bobs77vet
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start with somehting easy like checking the diff fluid
Old 04-27-2018, 03:46 PM
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bwill03z
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I have a little rear end whine in 5th and 6th while hwy cruising. I think a little is normal isn't it?!
Old 04-27-2018, 04:01 PM
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99blkfrc99
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Originally Posted by bwill03z
I have a little rear end whine in 5th and 6th while hwy cruising. I think a little is normal isn't it?!
I'm not sure. That's why I was asking. I had a c5 before this and the exhaust was so loud that I wouldn't have been able to hear it anyways.
Old 04-27-2018, 04:12 PM
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bwill03z
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Originally Posted by 99blkfrc99

I'm not sure. That's why I was asking. I had a c5 before this and the exhaust was so loud that I wouldn't have been able to hear it anyways.
i just changed out my rear end diff fluid a couple thousand miles ago, plus I had a little whine prior to that. Everything in my rear and tranny is stock and I've never had any issues with either. Unless the whining is pretty loud or you have clunking or grinding sounds I personally wouldn't worry about it. Every manual LS car I've ever head has had some minor rear end whine on the hwy.
Old 04-28-2018, 11:28 AM
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Been having the same whining lately. Just changed the diff fluid and it’s full of metal flakes and shimmered quite nicely.

Dropping tbe the car at the shop on Tuesday for what I’m pretty certain is going to be a new diff.
Old 04-28-2018, 04:02 PM
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99blkfrc99
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I'll change the fluid this week and see what it looks like
Old 04-30-2018, 03:35 PM
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Changed the fluid today and it's not pretty. The fluid that came out had the same color and duct tape. No good.
Old 04-30-2018, 04:23 PM
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St. Jude Donor '05-'06-'07-'08-'09-'10

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How many miles are on yours?

I have approx 70k miles on my 02Z. And Im not really understanding why we are seeing these starting to pop up now. If you look at the forums in the last few weeks I think there are 4-5 that have been talked about that just happened.
Old 04-30-2018, 04:47 PM
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Originally Posted by MBVette
How many miles are on yours?

I have approx 70k miles on my 02Z. And Im not really understanding why we are seeing these starting to pop up now. If you look at the forums in the last few weeks I think there are 4-5 that have been talked about that just happened.
I have 125k. But I have noticed a trend also.
Old 04-30-2018, 05:36 PM
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This is how mine looked when I changed it with 69k miles
Old 04-30-2018, 07:42 PM
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St. Jude Donor '05-'06-'07-'08-'09-'10

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This ks the bottom of my pan. Lots of small shavings morning big, but lots of them. And the oil had a very nice metallic shimmer to it.


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Old 04-30-2018, 08:17 PM
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bwill03z
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Originally Posted by MBVette
This ks the bottom of my pan. Lots of small shavings morning big, but lots of them. And the oil had a very nice metallic shimmer to it.


I dont recall having any shavings in the bottom of my pan, but I may have...
Old 04-30-2018, 08:39 PM
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St. Jude Donor '05-'06-'07-'08-'09-'10

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And that’s just what was left after I dumped the oil out into my 5g bucket I use to take it to dispose of the oil. Shavings are not a problem by themselves but I feel like It’s a lot.

The car car gets dropped off at the shop tomorrow morning. When They let me know what they think I’ll pass it along. I’m hoping they will give me some pics of the diff when they open it up. Assuming they agree the diff is the problem.
Old 04-30-2018, 08:52 PM
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bwill03z
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Originally Posted by MBVette
And that’s just what was left after I dumped the oil out into my 5g bucket I use to take it to dispose of the oil. Shavings are not a problem by themselves but I feel like It’s a lot.

The car car gets dropped off at the shop tomorrow morning. When They let me know what they think I’ll pass it along. I’m hoping they will give me some pics of the diff when they open it up. Assuming they agree the diff is the problem.
Yeah excessive shavings is never a good feeling. Well good luck hopefully you don't get bad news. Keep us posted

Last edited by bwill03z; 04-30-2018 at 08:53 PM.


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