I changed my rear end oil and put 3 quarts. I thought you needed to fill until it comes out of the plug in the back, but now I am second guessing myself? I changed it a few years ago but I don't remember what I did.

Also back in the day I did not know you needed some type of additive for the limited slip. What are the signs that you messed up something by not putting the additive in with the oil? I have been running for years without the additive and I don't see a problem. Maybe my limited slip does not work like it should? Oil was still very light brown.

I added the special stuff this time.