welding axle tubes to housing 12 bolt

[67ragtp]

A friend of mine just got his 12 bolt back from being redone with new gears and bearings, no gear oil in the rear, just pre lube during set up. He asked me to weld the tubes in a couple places around the housing, just not sure if its going to hurt the diff bearings which are somewhat close to the area of heat. Are there any risks doing it on an assembed set up?

Thanks Rich