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I just serviced my Nismo diff with the left-over Motul that I bought from Sharif@Forged 4000 miles ago (what a great vendor BTW!!!). The specs say that our diff holds 3 pints of oil, but I probably put in almost 4 pints (I pretty much finished one almost-full bottle which is ~2 Liters). Is too much LSD oil a bad thing? Obviously, too little is very bad.
if you jacked your car up from the back and it was leaning forward, I guess it is possible to overfill it a little, butI can't imagine a whole pint extra.
Yeah, I had my car jacked up from the rear on the passenger side, so that makes the fill hole on the side higher. I'll see if there is anything I can do about opening up the fill plug and leveling it out.
This is the fifth time I changed my diff oil. I wait about 3-5K miles.
it's on the top of the diff. you should see a line of fluid residue on the casing coming from the top (in the back)... just follow it up. I think it's just a hole with a valve.