If you are adding grease to a box but not cleaning it out fully you need to use the same type of grease that is already in the box to prevent the compounds in the grease from causing damage if they interact badly. The OEM also has a lower dropping point than most greases, that means it does not take much heat to soften it up in the winter so it flows and lets the steering loosen up. Many common moly lubes are higher so they would steer stiff for longer.
The factory grease is sold as Ford XG-1-C and is a molybdenum based grease light grease. Can be found in many places online or at a dealer.
Thursday, May 24th, 2018 AT 9:58 PM