Hi guys I’ve got a 2003 wrx blobeye coming back from a rebuild in January , looking at changing the diff and gearbox oil when it comes back, the clutch was changed not to long ago it sometimes crunches a little when it’s put in reverse but not to bad, it’s a standard 5speed wrx gearbox, anyone recommend what oil to use and whether anything else like sump plugs need changing. Cheers guys