Originally Posted by rubberchicken
I am working with a friend who had a differential sandblasted for a late 60's musclecar. The blasting company made a mistake, and it has some blasting media inside the gear housing. We are cleaning it up, but I want to flush out the diff one or twice. I have a lot of cheap 5w30 available, could this be used to flush out the diff ? Whatever I use, the working plan is to top off the fluid, run it for 5-10 minutes at idle , in grear, on a lift, then drain out.
Trying to understand what happened here. Was the housing bare or did it have the internals with no cover? I would say the proper thing to do would be to take it all apart and clean out the inside with brake cleaner, wiping down everything until the lint free towels are clean. Depending on what type of carrier, either disassemble and clean everything or drop the whole thing in a solvent tank, obviously not if a clutch type diff.