pat'sRAPTOR
FRF Addict
not too sure on a correct way to flush it but i drained it and make sure that the front end is higher than the rear i have ramps that are about 8" tall so i just drove up onto them this will allow the fluid to flow out easier after i let it drain for about 10 minutes i took a can of brake cleaner and sprayed out the rear diff so it reached way into the back of the gears then wipe it out as best you can let it dry and then install the cover and fill her up! you could get some cheap gear fluid and fill it up drive around the block then drain it one more time then fill it with the god stuff!