Title says it all! Advanced auto parts sells a rear diff gasket and cover kit for $10.99, Now I am going to replace the fluid aswell but I don't know what type to use? Help please?

 

80W-90 is what you need. Brand is a preference. I like Lucas, but that's just me.

Could have asked the counter guy/gal at Advance for that same info. We have a whole fluid type/fill catalog on the computers. Which we also have here on the forums. No biggy though. Here's the link to ours if you wanna take a peak at it.

https://camaroforums.com/forum/93-02...acities-70171/

 

Thank you very much, I was worried about the right vesocity, Brand I haven't decided, but thank you for your help.....

 

I went w/full synthetic -- if you have a LSD, you need the LSD additive...

 

i used synthetic and my rearend clutch went by by. not sayin for sure thats what ruined it but i think it helped it along the way.

 

You're not the only one I've heard that happening to. I put Lucas synthetic in the rearend of my Vette, and that slips every once in a while. I'm going back to conventional oil in the rear. I don't see the need or want for a superior lubricant in a clutch type LSD anyway.
The LSD additive isn't a traction adder, it prevents the clutches from gumming up and sticking, which causes clunking in turns.

 

I used Lucas w/o the additive and haven't had trouble yet (knock on wood) and I want to say that was about 5-6k ago. May be I just got lucky?

 

the early LSD's cant use synthetic

 

"Can't"? Why do you say that?

 

Here's the scoop on the additive:

"Is it true that the Torsen unit in the production Camaro needs the GM modifier added?

GM issued a technical bulletin adding modifier to the rear axle oil. This was done to quiet what we call a "Rusty Screw" noise that we heard in a very small percentage of vehicles. This does not happen in all cases, however to address owner's concerns we asked that the modifier be used in all instances to insure that the driver would not get this noise. When replacing the fluid it is at the owner's discretion whether or not to add the modifier. Elimination of the modifier does not affect durability of the differential."

Torsen General Frequently Asked Questions page