If you just pack wheel bearing grease in there, the axles will tunnel the grease and nothing will reach the upper pivot bearings. If you put gear lube in there, even with new wiper seals, it will run out all over. the 00 grease (about 1500wt) is about right. There is no factory specs on this stuff. No one has ID'd the stuff that was in there to begin with, and it was not 90wt. Semi solid grease is what is the best guess of old technicians of the era.
