[GreenZLE]

One thing is for certain, if you use something with friction modifier, its a safe choice in anything.

[SnakeEyeSS]

Now we need someone with a 24 to look in their manual

[arpad_m]

Originally Posted by SnakeEyeSS

Now we need someone with a 24 to look in their manual

You wish... these newer manuals only say "See your dealer" instead of giving you a part number. Just checked the 2024, it's the same.

[Iconic]

Originally Posted by arpad_m

You wish... these newer manuals only say "See your dealer" instead of giving you a part number. Just checked the 2024, it's the same.

Yep. My 2024 owners manual states "see your dealer"

[cdb95z28]

88862624 (AC DELCO 10-4034) is relevant for all years

[Rock-It Man]

Originally Posted by Rock-It Man

Use your words.

Nope. Use your words or I don't care.

[BLKZL12021]

Originally Posted by Warrior102

Rock-It Man's research is correct, thats because the E-Diff doesn't require a friction modifier, the clutches are located in a separate circuit that uses automatic transmission fluid to control clutch engagement levels. In a standard limited slip spring pressure maintains clutch engagement until axle rotation overcomes the friction, modifiers prevent the clutch pack from chattering. the E-Diff can engage the clutch from 0 - 100 percent or anywhere between via separate computer controlled hydraulic circuit so no chattering. That said having it will likely not cause a problem but it's not required as the clutches are in another housing. Mobil1, AMSOIL and Royal Purple all make excellent 75W-90 without the additive, GM sources its gear oils from various suppliers. I use this with excellent results on my 1LE and Sierra's locker. https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

I just used the 19352759 in my differential and didn’t use the additive and was having a panic attack. Sounds like I’m good? Also do you ever have to change the elsd fluid that is in the separate compartment?

[Caerus]

Originally Posted by BLKZL12021

Also do you ever have to change the elsd fluid that is in the separate compartment?

A great question to ask.

[z28pat]

Old thread but how how much did the people that had this done at the dealership pay for the rear diff service?

[Caerus]

Originally Posted by z28pat

Old thread but how how much did the people that had this done at the dealership pay for the rear diff service?

I supplied my own Redline differential fluid below (2 qts). The dealer charged 0.60 labor hours, plus fluid disposal fee and tax cost $70.91 total. They let me watch the procedure and they did a fine job of it.

https://www.redlineoil.com/75w90-gl-5-gear-oil

[jfkheat]

Originally Posted by z28pat

Old thread but how how much did the people that had this done at the dealership pay for the rear diff service?

I called 2 dealers fairly close to me and was quoted $200 and $250.

[Warrior102]

Originally Posted by BLKZL12021

I just used the 19352759 in my differential and didn’t use the additive and was having a panic attack. Sounds like I’m good? Also do you ever have to change the elsd fluid that is in the separate compartment?

You are good. The ATF circuit for the ELSD is not really user serviceable as any air has to be purged by cycling with the Tech 2, that said it's a hydraulic/cooling function so it's not exposed to contaminants.

[GroverDill]

I just did this 1704 miles on my 23.





and the oil change too


I have a couple of lifts so it was very easy for me, but would be doable on jackstands, that pump worked mint.