Rear end grinding noise - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

DagoCountyGee · 04-10-2022, 06:28 PM

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?

NOT A 45 · 04-11-2022, 06:22 AM

Quote:

Originally Posted by DagoCountyGee

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?

Did you notice any metal in the old gear oil? Are you sure it's not a rear hub bearing?

DagoCountyGee · 04-11-2022, 12:56 PM

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

NOT A 45 · 04-11-2022, 01:10 PM

Quote:

Originally Posted by DagoCountyGee

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

Pinion bearings but id replace all

SS Performance · 04-11-2022, 05:52 PM

Is it posi? Did you add friction modifier?

Posi unit can wear out and make strange noises.

DagoCountyGee · 04-11-2022, 07:57 PM

Quote:

Originally Posted by SS Performance

Is it posi? Did you add friction modifier?

Posi unit can wear out and make strange noises.

Im sorry what is posi?
I did not add modifier since i used mobil 1 fluid.

DagoCountyGee · 04-11-2022, 07:59 PM

Quote:

Originally Posted by NOT A 45

Pinion bearings but id replace all

Hmm 🤔 ….

NOT A 45 · 04-11-2022, 08:11 PM

Quote:

Originally Posted by DagoCountyGee

Hmm 🤔 ….

Trust me

silversleeper · 04-12-2022, 09:44 PM

He is saying you need a rear differential "rebuild" if it wasn't clear.

1JEWLDSSRS · 04-13-2022, 02:31 PM

Quote:

Originally Posted by silversleeper

He is saying you need a rear differential "rebuild" if it wasn't clear.

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.

gtstorey · 04-13-2022, 02:33 PM

The noise started before he changed the fluid.

1JEWLDSSRS · 04-13-2022, 02:41 PM

Quote:

Originally Posted by gtstorey

The noise started before he changed the fluid.

Did not see that. Thanks..

NOT A 45 · 04-13-2022, 02:47 PM

Quote:

Originally Posted by 1JEWLDSSRS

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.

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.

1JEWLDSSRS · 04-13-2022, 02:59 PM

Quote:

Originally Posted by NOT A 45

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.

Well sir, thanks for that info. That is good to know in case I ever have any diff noise issues.. Appreciated.

04-10-2022, 06:28 PM	#1
DagoCountyGee Drives: '15 SS Join Date: Sep 2012 Location: North County Posts: 1,235	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? __________________ Follow My Car on INSTAGRAMhttp://www.instagram.com/forb1dd3n_ss

04-11-2022, 12:56 PM	#3
DagoCountyGee Drives: '15 SS Join Date: Sep 2012 Location: North County Posts: 1,235	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 __________________ Follow My Car on INSTAGRAMhttp://www.instagram.com/forb1dd3n_ss

04-11-2022, 05:52 PM	#5
SS Performance Drives: 02 Camaro B4C Join Date: Nov 2016 Location: Cape May County NJ Posts: 750	Is it posi? Did you add friction modifier? Posi unit can wear out and make strange noises. __________________ A man's garage is his castle 1969 Camaro SS 1970 Camaro SS 2002 Camaro B4C 2014 Camaro SS Dedicated Track Car 2015 Camaro 1SS 1LE 2008 HHR SS 1996 Silverado Crew Cab Long Bed Dual Rear Wheel

04-12-2022, 09:44 PM	#9
silversleeper Big Crow Drives: '13 ZL1 Join Date: Mar 2017 Location: California Posts: 1,486	He is saying you need a rear differential "rebuild" if it wasn't clear.

04-13-2022, 02:33 PM	#11
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,155	The noise started before he changed the fluid.