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BeckyD @ James Martin Chevy

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Old 12-19-2020, 03:44 PM   #1
Drives: 2018 camaro 2 ss
Join Date: Feb 2018
Location: FL
Posts: 41
Rear diff

I thought if you develop the dreaded groan in rear diff, they replace the gear oil with a special gear oil. Does anybody know what the number of the gear oil is?

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Old 12-19-2020, 08:57 PM   #2
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Drives: 2016 Camaro 1LT v6
Join Date: Mar 2017
Location: Houston, TX
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Quick search shows TSB #17-NA-287

From my understanding, they use the factory defined fluid from the owners manual. So it's just a drain and refill I guess?

Manual shows "Rear Differential Fluid 75W-90 Limited Slip (GM Part No. 88900401) Add Limited Slip Additive GM Part No. (88900330)"
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Old 12-21-2020, 01:19 PM   #3
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Drives: 2019 ZL1 M6
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Location: Republic of Texas
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Royal Purple Max Gear 75W-90 Synthetic Gear Oil is what I use and no groan.

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Old 12-21-2020, 07:46 PM   #4
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Drives: Duramax, 2018 Camaro SS 1LE
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I use Red Line GL-5 Gear Oil (57905) No noises here.
If it ain't buckin, chirpin & makin all kinds of bad noises.... then I ain't happy!
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