E differential
Racer
Joined: Aug 2019
Posts: 436
Likes: 239
From: Las Vegas
The ELSD is a little different in that two fluids are required.
Dexron-VI ATF is used in the clutch area of the ELSD.
The area of the ELSD that houses the ring & pinion gears uses 75W-90 gear oil.
Dexron-VI ATF is used in the clutch area of the ELSD.
The area of the ELSD that houses the ring & pinion gears uses 75W-90 gear oil.
Last edited by KLG; Jan 7, 2021 at 09:44 PM.
Safety Car
Joined: Mar 2018
Posts: 4,754
Likes: 1,650
Racer
Joined: Aug 2019
Posts: 436
Likes: 239
From: Las Vegas
I realize it is a little confusing and the owner's manual does not explain this as well as it should.
Regardless, only the clutch area of the ELSD uses the Dexron-VI ATF.
The part of the ELSD with the ring and pinion gears uses 75w-90. About 3 quarts if I remember correctly.
--KLG--
Regardless, only the clutch area of the ELSD uses the Dexron-VI ATF.
The part of the ELSD with the ring and pinion gears uses 75w-90. About 3 quarts if I remember correctly.
--KLG--
Safety Car
Joined: Mar 2018
Posts: 4,754
Likes: 1,650
I realize it is a little confusing and the owner's manual does not explain this as well as it should.
Regardless, only the clutch area of the ELSD uses the Dexron-VI ATF.
The part of the ELSD with the ring and pinion gears uses 75w-90. About 3 quarts if I remember correctly.
--KLG--
Regardless, only the clutch area of the ELSD uses the Dexron-VI ATF.
The part of the ELSD with the ring and pinion gears uses 75w-90. About 3 quarts if I remember correctly.
--KLG--
It is illustrated here in this Spring Mountain video.
Racer
Joined: Aug 2019
Posts: 436
Likes: 239
From: Las Vegas
[QUOTE=MMD;1602794695]What confuses people is reading posts like yours. The owner's manual clearly states which fluid is required. The eLSD is not normally serviced. ATF is used within the eLSD. The eLSD is to used to drive a hydraulic system which drive pistons, using an a computer controlled pump, that clamps clutch plates shut. This side of the differential assembly is isolated from the gear oil that flows within the gear assembly.
It is illustrated here in this Spring Mountain video./QUOTE]
A good and informative video, thanks for sharing.
And yes, the owners manual states the clutch portion of the ELSD takes the ATF.
And the following page in the OM states the rear axle (where the ring and pinion gears are located) requires the 75W-90.
It seems you and I may be saying basically the same thing...the clutch area uses the ATF and the gear area uses the gear oil.
I can't be certain of course, but I suspect the OP was asking about the differential gear oil since that is the oil that can be easily changed.
--KLG--
It is illustrated here in this Spring Mountain video./QUOTE]
A good and informative video, thanks for sharing.
And yes, the owners manual states the clutch portion of the ELSD takes the ATF.
And the following page in the OM states the rear axle (where the ring and pinion gears are located) requires the 75W-90.
It seems you and I may be saying basically the same thing...the clutch area uses the ATF and the gear area uses the gear oil.
I can't be certain of course, but I suspect the OP was asking about the differential gear oil since that is the oil that can be easily changed.
--KLG--
Last edited by KLG; Jan 7, 2021 at 11:41 PM.
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Burning Brakes
Joined: Nov 2017
Posts: 800
Likes: 326
I would love to change the fluid in this, but after reading the manual it is much more complicated than just draining and refilling. It takes a special tool to circulate the old fluid out and replace with new fluid. Has anyone found a way to change it??
Melting Slicks
Joined: Jun 2019
Posts: 2,035
Likes: 928
From: near philly
I don't think the actual clutches run in this fluid like some people are stating but I'm not sure.
My understanding was that that fluid ONLY pushed pistons to vary the pressure ON the discs, and beyond that the system operates like any limited slip within the regular gear oil.
the regular gear oil is what gets disgusting and needs changing.
Safety Car
Joined: Mar 2018
Posts: 4,754
Likes: 1,650
If you are tracking the vehicle you should get the eLSD serviced. You should have a GM dealer perform that service as it requires purging of air using a GM scan tool exercising valves within the pump. Changing the gear oil is another matter. If you do this properly you drain & fill. Then you should drive the vehicle around the block and lift the vehicle again and top it off. I didn't take this last step so my diff is a tad low on oil. I can live with this.
Last edited by MMD; Jan 8, 2021 at 11:08 AM.
Drifting
Joined: Sep 2019
Posts: 1,913
Likes: 1,957
From: Colo Spgs, CO
Change the fluid in what, exactly - the diff itself or the clutch system? Special tools aren't required for the former, but the latter isn't designed for DIY maintenance.
Racer
Joined: Aug 2019
Posts: 436
Likes: 239
From: Las Vegas
it's not really meant to be changed, it's just a hydraulic system
I don't think the actual clutches run in this fluid like some people are stating but I'm not sure.
My understanding was that that fluid ONLY pushed pistons to vary the pressure ON the discs, and beyond that the system operates like any limited slip within the regular gear oil.
the regular gear oil is what gets disgusting and needs changing.
I don't think the actual clutches run in this fluid like some people are stating but I'm not sure.
My understanding was that that fluid ONLY pushed pistons to vary the pressure ON the discs, and beyond that the system operates like any limited slip within the regular gear oil.
the regular gear oil is what gets disgusting and needs changing.
The ATF is the hydraulic fluid that engages the clutch system (kind of like the purpose of brake fluid for our brake systems).
--KLG--
Last edited by KLG; Jan 8, 2021 at 04:06 PM.
Burning Brakes
Joined: Nov 2017
Posts: 800
Likes: 326
So no work around on the e-slip fluid. To bad. There is a procedure in the manual to change the fluid, and all fluid should be changed at some point. To bad there is no work around like owners found with the intercooler coolant. I really don't trust any of the dealerships in my area.
Safety Car
Joined: Mar 2018
Posts: 4,754
Likes: 1,650
So no work around on the e-slip fluid. To bad. There is a procedure in the manual to change the fluid, and all fluid should be changed at some point. To bad there is no work around like owners found with the intercooler coolant. I really don't trust any of the dealerships in my area.
Team Owner
Joined: Feb 2000
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From: Texas
CI 1-4-5-8-9-10 Vet
St. Jude Donor '03 thru '10, '17
What confuses people is reading posts like yours. The owner's manual clearly states which fluid is required. The eLSD is not normally serviced. ATF is used within the eLSD. The eLSD is to used to drive a hydraulic system which drive pistons, using an a computer controlled pump, that clamps clutch plates shut. This side of the differential assembly is isolated from the gear oil that flows within the gear assembly.
It is illustrated here in this Spring Mountain video.
https://youtu.be/k1j6ZzWXRMw
It is illustrated here in this Spring Mountain video.
https://youtu.be/k1j6ZzWXRMw