04-10-2022, 06:28 PM | #1 |
Drives: '15 SS Join Date: Sep 2012
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Rear end grinding noise
Hey everyone. Havent been on here in a minute, glad to see its still active. So ive been hearing a grinding noise coming from my rear end so i thought i would change the rear differential oil but the noise didn’t go away. Anyone else experience this?
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04-11-2022, 06:22 AM | #2 |
Drives: 13 CAMARO 2SS LS3-04 SILVERADO LS3 Join Date: Dec 2021
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Did you notice any metal in the old gear oil? Are you sure it's not a rear hub bearing?
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04-11-2022, 12:56 PM | #3 |
Drives: '15 SS Join Date: Sep 2012
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Yeah there was metal in the plug. Also the noise is more noticeable when going up hill. Very rarely do i hear it when its flat. Not sure about the rear hub bearing
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04-11-2022, 01:10 PM | #4 |
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04-11-2022, 05:52 PM | #5 |
Drives: 02 Camaro B4C Join Date: Nov 2016
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Is it posi? Did you add friction modifier?
Posi unit can wear out and make strange noises.
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04-11-2022, 07:57 PM | #6 | |
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Quote:
I did not add modifier since i used mobil 1 fluid.
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04-11-2022, 07:59 PM | #7 |
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04-11-2022, 08:11 PM | #8 |
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04-12-2022, 09:44 PM | #9 |
Big Crow
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He is saying you need a rear differential "rebuild" if it wasn't clear.
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04-13-2022, 02:31 PM | #10 |
Drives: 2011 SS-RS Join Date: May 2011
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This, and the fact that you did NOT put any additive in there, will mess things up. I don't believe Mobil 1 diff fluid has any additives in it, and these LS diffs require it. Or they will make all sorts of noises and not work correctly.
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04-13-2022, 02:33 PM | #11 |
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The noise started before he changed the fluid.
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04-13-2022, 02:41 PM | #12 |
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Did not see that. Thanks..
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04-13-2022, 02:47 PM | #13 |
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Mobil makes our gear oil....the proper oil is the LS gear oil. Not sure if Mobil 1 has those same ingredients but from the sound of his symptoms his car is making noise driving straight. The gear oil issue comes into play when turning because the clutches in the differential are chattering and not slipping smoothly. His description of noise on accell and quieter off the gas along with metal in the fluid is classic pinion bearing failure. Side bearings tend to make noise all the time.
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04-13-2022, 02:59 PM | #14 | |
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Quote:
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TSP STAGE 3 CAM,231/246 @112 LSA 614/641 LIFT, CIRCLE D 5C-4200-4500 CONVERTER,LOD INTAKE.CORSA EXHAUST. DSS 1 PC DS. PEGASUS SOLID CRADLE MOUNTS. 486RWHP/475RWTQ.LOTS MORE.
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