it would be in your best interest to pull the cover & axles and do an inspection as well as refill it with fresh fluid. Higher capacity covers are not that expensive and usually have fill/drain ports on them for easy servicing.

get yourself a lube locker gasket from Amazon for your application too.


I also like to put a few 1/2" round by 1/8" thick Neodymium Magnets inside the case to catch metal flakes and act as filters.