CK10 vs the 1 ton bag

[55RRR]

... I do change the front axle lubricant every spring (and check it for 'glitter') as well and I use 85-140 gear oil, not hydraulic oil. ...

Wondered about that. Manual says SAE 90 gear oil or same as transmission oil, every 400 hours, though for the sake of long life (and because I push my equipment) might do the same with a full synthetic 75W-140.