ive got ae 2k in my diff havent run it yet but thinner diff oils would probley work ok i definetly wouldnt try 10k man i would think that thick fluid wouls make this little diff a locker. heck i never ran 10k in my 1/8th scale dont see tryin it on a 10th scale. i watched one run yesterday at my track and despite my track being kinda loose the sc10 didnt look very good with the stock set up on it. the rear end just wanted to step out and it didnt wanna turn very well. a longer camber link is definetly a must but for my track its gonna need some tuning.