Good afternoon all. I have just filled my AA 11.5 differential in the 06 Chevy 2500 with the Gear 300. I was informed by the dealership that the rear has positraction. I also just took note that Motul's site states not to use this in differentials with limited slip. I haven't noticed any ill effects in the 100 miles that I have driven so far. Should I drain it out, or add some LS additive? I was under the impression that synthetic gear oils include a LS additive and it wouldn't be necessary to add some. However, because of Motul's statement, I am a bit concerned. Any advice would be appreciated. Thank you.