Genuine John Deere Cornhead Grease. This is what you have been looking for to lubricate your steering knuckles with Bendix/Rezeppa type steering u-joints. This is a soft grease specially made for these type of demands. This will also work in your manual steering boxes, firm enough to move with the gears, but will not flow to the bottom of the steering box leaving the top portion of the steering gear un-lubricated. Resists leaking out of the steering knuckles. Comes in grease gun tube for mess free fill ups.
1 tube does both knuckles.