pass over everything with 6010 5p+
then run over that with 7018 lhr
with a dc stick welder.
the 7018 has to be run uphill or flat.
have the gears tacked while axles still in them to make sure the welding dosnt pull the side gears out of alinement. no need to pre heat when 60105p
+ is used first
if he is going to do it with an ac welder with no fine tuneing or a mig/fluxcore dont have them do it, and find a qual. welder with a dc rig.