G W

Thank you for the part number, but it seams to be discontinued.

So without being able to find the type of thickener I'm left with little choice but to service it and solvent clean all the old grease and replace it with a known and available gearbox grease.(like one of the several types I keep on hand).

Several common grease thickeners will react and cause either excessive thinning or less often hardening, either way poor lubrication.
This isn't geneally an issue with low speed items like steering pivot bearings(and some generally gets pushed or flushed out at every application), but in a churning high speed gear box excessive wear may result.

I may call husq in a last attempt to get this info before doing the grease replacement.

My car's manual says that the transmission fluid never needs changing but I could tell it was breaking down and after replacing it it had noticably better shifting. Sometimes equipment makers don't want products to last for decades and give service advice with that in mind, many other times management was just penny pinching and hired someone cheap to write the service manual.