I've seen 00 grease used as well for steering boxes/gears. It's more fluid than 0 grease (see chart below). I have an older Alfa Spider and folks use 00 grease in the steering boxes. I plan to use it my Pantera as I go through various maintenance items this winter. Some more info on 00 grease below that may be helpful.
A few examples for 00 grease: Search Results for cotton picker grease at Tractor Supply Co. or Semi Fluid and Steering Box Lube – Penrite Classic Oils