Along with the grease I have added a little Justin Brothers friction modifier to the steering box and a little to the trans, they have always steered a lot easier and the trand shifted smoother, usually topped off the steering box and the rest split between the trans and rear gear from one can. A friend of mine run a mini hot rod pulling tractor and always had rear end heat problem until he started using it and his rear gear lasted at least 3 times longer.
