Rear end groan after oil change on ELSD???

Hasti · 08-15-2023, 11:55 AM

Did my diff fluid change after 1500 on my 1le and used the Valvoline options.
It ended up giving the first turn of the morning groan that didnt have it before.
I waited awhile for it to completely empty and didnt over fill. anyone have thoughts?

m6-lt1 · 08-15-2023, 12:29 PM

Drain again and ONLY use the ac delcon GM stuff.

ctrlz · 08-15-2023, 12:40 PM

Quote:

Originally Posted by m6-lt1

Drain again and ONLY use the ac delco GM stuff.

Without knowing the exact Valvoline product and the friction modifiers present, it is hard to know if what you used is compatible.
it is the friction modifiers which allow the plates to slip smoothy while turning.

So, yep, sticking with AC Delco probably safest.

Nothing like an SS · 08-15-2023, 12:45 PM

As stated, drain it and fill it with AC Delco fluid with the correct additives

Dynamical · 08-15-2023, 01:43 PM

Let us know after you do it and if the noise goes away. Good luck

Does anyone know the exact up to date part number for the AC Delco?

Hasti · 08-15-2023, 02:24 PM

This is the stuff i used

https://www.amazon.com/Valvoline-Syn...1zcF9hdGY&th=1

Anom1LE · 08-15-2023, 03:15 PM

Quote:

Originally Posted by Hasti

This is the stuff i used

https://www.amazon.com/Valvoline-Syn...1zcF9hdGY&th=1

Literally ONLY run this fluid in your ELSD, unless you want premature failures in your near future. Buy 2 of these, drain your current mess out and fill till full with Dexron LS.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Dynamical · 08-15-2023, 04:06 PM

Quote:

Originally Posted by Anom1LE

Literally ONLY run this fluid in your ELSD, unless you want premature failures in your near future. Buy 2 of these, drain your current mess out and fill till full with Dexron LS.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

And that's yet another part number I never seen before. Not sure why it's so difficult for GM to list the correct part number in the book. At least mine does NOT say what to use. It says "see your dealer" in my book.
Does the ELSD take a different fluid than the MLSD?
I'm looking at 3-4 different part numbers on this fluid which I cannot decipher the difference

https://www.amazon.com/Genuine-88900.../dp/B00BK7LXGM

https://www.amazon.com/ACDelco-10-41.../dp/B07CL6MBX5

https://www.amazon.com/ACDelco-10-40.../dp/B000QGOX1A

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

GM does a great job with giving me a headache

MT-SS1LE · 08-15-2023, 04:20 PM

Quote:

Originally Posted by Anom1LE

Literally ONLY run this fluid in your ELSD, unless you want premature failures in your near future. Buy 2 of these, drain your current mess out and fill till full with Dexron LS.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

That's exactly what I've used to do two fluid changes within the first 1500 miles. It was $16 a quart when I bought them. Works perfectly and I don't see a reason to chance it using an aftermarket product when you can get the oem oil for virtually the same price.

CalgaryZL1 · 08-15-2023, 05:20 PM

Don’t dick around with the rear end only run the Dexron LS period! And if you plan on keeping your car for a long time do it annually, it’s cheap insurance.

CalgaryZL1 · 08-15-2023, 05:38 PM

Quote:

Originally Posted by Dynamical

And that's yet another part number I never seen before. Not sure why it's so difficult for GM to list the correct part number in the book. At least mine does NOT say what to use. It says "see your dealer" in my book.
Does the ELSD take a different fluid than the MLSD?
I'm looking at 3-4 different part numbers on this fluid which I cannot decipher the difference

https://www.amazon.com/Genuine-88900.../dp/B00BK7LXGM

https://www.amazon.com/ACDelco-10-41.../dp/B07CL6MBX5

https://www.amazon.com/ACDelco-10-40.../dp/B000QGOX1A

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

GM does a great job with giving me a headache

Both the Canadian and American numbers are only one digit different and both those part numbers have been around for a long time, best thing to do is make sure it has the friction modifier additive already included in the formula instead of this new synthetic shit where you have to add it, I would rather just change it every year for the peace of mind instead of trying to go 45,000 miles, which is what they probably recommend

RamAir02 · 08-15-2023, 07:04 PM

Quote:

Originally Posted by Dynamical

And that's yet another part number I never seen before. Not sure why it's so difficult for GM to list the correct part number in the book. At least mine does NOT say what to use. It says "see your dealer" in my book.
Does the ELSD take a different fluid than the MLSD?
I'm looking at 3-4 different part numbers on this fluid which I cannot decipher the difference

https://www.amazon.com/Genuine-88900.../dp/B00BK7LXGM

https://www.amazon.com/ACDelco-10-41.../dp/B07CL6MBX5

https://www.amazon.com/ACDelco-10-40.../dp/B000QGOX1A

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

GM does a great job with giving me a headache

GM makes a lot of different vehicles...

ACDelco 10-4034 (GM 88862624 in US, 88862625 in CA) is for our cars.

ACDelco 10-4016 is what my 4th gen trans am takes.

The information is in the owner's manual. Page 329 in the 2019 manual. Might be a different page for different model year.

lt4camaro · 08-15-2023, 07:42 PM

Quote:

Originally Posted by Hasti

Did my diff fluid change after 1500 on my 1le and used the Valvoline options.
It ended up giving the first turn of the morning groan that didnt have it before.
I waited awhile for it to completely empty and didnt over fill. anyone have thoughts?

Drain some oil out and add the same amount back of the friction modifyer. I changed my rear end oil with the mobile 1 product that has the friction modifiers in it, but had to add a half tube of the friction modifier to stop the groan. Its been gone for 15k miles.

Mountain · 08-15-2023, 07:46 PM

Quote:

Originally Posted by m6-lt1

Drain again and ONLY use the ac delcon GM stuff.

Please explain why.

Quote:

Originally Posted by ctrlz

Without knowing the exact Valvoline product and the friction modifiers present, it is hard to know if what you used is compatible.
it is the friction modifiers which allow the plates to slip smoothy while turning.

So, yep, sticking with AC Delco probably safest.

The eLSD does not have it's clutches within the main gear housing of the rear end. The clutches are in a separate fluid, in a separate housing.

Ive used Mobil 1 and Valvoline (most often due to it's slightly better VI) for 30k miles in my 1LE and it's seen many drain/fills and hard track use. I guess it's a ticking time bomb.

It's easy to blame the gear oil here, as that's the only one (1) thing mentioned, but no one here has heard the OP's actual noise or put eyes on the vehicle, yet you all are jumping to a definite conclusion.

08-15-2023, 11:55 AM	#1
Hasti Drives: 2017 Hot Red 2ss Auto adrenaline Join Date: Aug 2017 Location: Detroit Posts: 97	Rear end groan after oil change on ELSD??? Did my diff fluid change after 1500 on my 1le and used the Valvoline options. It ended up giving the first turn of the morning groan that didnt have it before. I waited awhile for it to completely empty and didnt over fill. anyone have thoughts?

08-15-2023, 12:29 PM	#2
m6-lt1 Drives: 2023 Chevrolet Camaro 2SS 1LE Join Date: Jan 2020 Location: Pennsylvania Posts: 1,037	Drain again and ONLY use the ac delcon GM stuff. __________________ Current: 2023 2SS 1LE Prior: 2016 Camaro 1SS 2007 Mustang GT 2008 Civic Si

08-15-2023, 01:43 PM	#5
Dynamical Drives: 2022 Camaro LT1 A10 Join Date: Nov 2015 Location: new england Posts: 373	Let us know after you do it and if the noise goes away. Good luck Does anyone know the exact up to date part number for the AC Delco? __________________ 2022 Camaro LT1 A10 - Drag Pack/AxleBack -11.849@118.67MPH/1.798 60' 2001 Camaro SS A4 - HCI/Stall/Bolt-on/Gear/Tune/DR/Diet - 429HP/392TQ - 10.99@123.58MPH/1.584 60' 1998 Camaro Z28 A4 - Bolt-on 1999 Camaro Z28 A4 - Stock *FJB*

08-15-2023, 05:20 PM	#10
CalgaryZL1 Drives: 2020 Chevy Camaro ZL1 Join Date: Apr 2023 Location: Calgary Canada Posts: 1,483	Don’t dick around with the rear end only run the Dexron LS period! And if you plan on keeping your car for a long time do it annually, it’s cheap insurance. Attached Images

08-15-2023, 12:45 PM	#4
Nothing like an SS Faster!!! Drives: 2020 Camaro 1SS 1LE Join Date: Mar 2020 Location: Long Island NY Posts: 991	As stated, drain it and fill it with AC Delco fluid with the correct additives

08-15-2023, 02:24 PM	#6
Hasti Drives: 2017 Hot Red 2ss Auto adrenaline Join Date: Aug 2017 Location: Detroit Posts: 97	This is the stuff i used https://www.amazon.com/Valvoline-Syn...1zcF9hdGY&th=1

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