Chevyguy2001

2000 SS has 56,xxx miles on it, I dont think the gear oil has ever been changed. I have a few questions: #1 how much oil? #2 what kind? #3 what brand? and do i do the oil change via the fill hole (suction pump) or would you reccommend taking the diff cover off and replacing the gasket and the cover?? its not a daily driver, only to car shows and a few times driven to work a month and is in winter storage.

Thanks.

redbird555

iTrader: (14)

1. 2qts
2. I use any brand thats on sale doesnt matter too much.
3. 75w-90 dino or synthetic if you have money

I always take the cover off just easier for me. And fwiw I dont remember the last time I used a gasket on a diff cover. I always just clean everything well and seal it up with permatex silicone.

Also you should add a bottle of the limited slip friction modifier. Technically its not needed unless you have the optional auburn diff but its only $7 and will help keep things quiet.

SSCamaro99_3

iTrader: (1)

You should also not use synthetic if you have an Auburn.

Chevyguy2001

There is nothing saying that i have a Auburn. its a Stock SS no extra options on it.

ss performance

iTrader: (17)

I would go with synthetic. When you remove the cover you get a change to visually inspect the gears and look fo ant metal shavings, indication of excessive wear and such.

DemonicZ

I run 75w-90 Royal purple with LSD additive, I always remove the the cover to inspect and look things over. I always get "the right stuff" gasket maker. this is my third time changing it in 2 different rearends. I also painted both of my housings in high temp semi gloss black paint just to help protect against rust and such. I use 2 quarts and use one of those pump bottle tops its a bit easier.

beyonddisturbed

iTrader: (5)

Damn thing is kind of a pain to fill but the rest is easy. I use 2 quarts mobil 1 diff fluid and GM additive. Scrape off the gasket once you have the cover off to prevent leaks. I used the permatex red gasket maker on the reinstall. X2 on the pump bottle. Gravity drain method is a bitch even on a lift.

Chevyguy2001

Where would i get a bottle top pump?

Z28SLPCAMAROZ28

Sorry to bring up and old thread but I'm not going to start a new one.

Anyways I bought the 4oz bottle of GM LSD additive. Went Napa and bought some Mobil 1 75w-90 fluid. Once I got home I realized it has the LSD fluid additive as well. Is this going to hurt if I put both bottles with the LSD additive plus the GM LSD additive in?

Thanks!

01ssreda4

iTrader: (96)

Well, it shouldn't hurt at all. But, I would try just the gear oil first, and if you notice anything weird then go back and add the bottle of GM fluid.

Z28SLPCAMAROZ28

Ok sounds good! Thanks!

01ssreda4

iTrader: (96)

Depending on the formula, the clutches can act a little finicky from what I've heard. Some suggest dino non-additive gear oil with a bottle of GM, and some suggest syn gear oil only, some suggest syn with GM added. It's really a wash in my book, try one and if it gives you any trouble, try a different method. It seems to be hit or miss.

Z28SLPCAMAROZ28

Well, when I opened it up for my LPW install, I found I have a Torsen unit so the LS additive is optional. So I'll just be using the gear oil with LS additive.