Going to change gear oil
#1
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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.
Thanks.
Last edited by Chevyguy2001; 03-15-2013 at 12:27 PM.
#2
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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.
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.
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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.
#7
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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.
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#9
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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!
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!
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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.
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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.