lump_a_charcoal wrote:
Your bearings shouldn't be oily anyway, hence the axle seal.
Do you have a large offset or large tryes?
You should be able to just weld up the housing, but do it in small sections so as not to warp it too much.
The only way you will be able to weld this up is if you strip the diff down and clean it properly. Diff oil is near impossible to weld through.