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rear diff whine-shops in SoCal you would trust

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Old Yesterday | 12:15 PM
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Default rear diff whine-shops in SoCal you would trust

My new to me 2019 ZO6 had 16000 miles on it when I bought it. Now at 20000 miles I'm noticing the rear diff whine with throttle applied only. It's not loud, so I don't know if it was there from when I bought it or recent development. If the exhaust is in sport mode you can't hear it and I've recently been running the exhaust in tour mode so noticed it now. I have new correct gear oil ordered and will change it next week and see what happens. I already did the trans triple flush myself and it cured the slight shudder I started to notice. I like to do all my own work, but if it needs a new rear diff I'm considering having it done.
So has anyone had this work done in the SoCal area? Anyone you would trust to do it right with a warranty on their work? Would you replace or have it rebuilt? I've read that the 2019 ZO6 got an upgraded rear diff, so I would think it should only be ring and pinion meshing and not the bearings also?
Thanks for any help!

Last edited by drive it; Yesterday at 12:17 PM.
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Old Today | 10:16 AM
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On my 2017 Z06 I started to get a slight whine, I changed the fluid with the recommended GM fluid and is fine now. I think some of the factory fills were low. I would definitely do that first
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Old Today | 03:15 PM
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Originally Posted by 2001PewterWS6
On my 2017 Z06 I started to get a slight whine, I changed the fluid with the recommended GM fluid and is fine now. I think some of the factory fills were low. I would definitely do that first
How many miles did you have on it at the time?
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Old Today | 04:18 PM
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About 11,000 miles. I have a lot of 60-130 and 1/4 mile pulls on it and I am making 900+ rwhp

Last edited by 2001PewterWS6; Today at 04:19 PM.
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