I just flipped 1200 miles on the R/T today and decided to change the rear gear goo. 3 bottles of RedLine 75W90 standing by. Drained 30ozs out. Really? It took 48ozs until fluid ran out of the fill hole. Low again from the factory and even after the "great" dealer PDI. I can't believe how little oil is in these differentials. But only 48ozs, I'll change it every year.