You can mix corn head grease with 90 weight gear oil (about 70/30) and make a lubricant that does very well. With grease it is very important that you have something which will remain liquid in cold weather and over time. About 5 years ago I took a steering box apart which had been lubricated with what looked like chassis grease and the thing was shot. The grease had done very little to protect the wearing surfaces and the bearings were completely gone.

~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end