I'm just about finished up with building a new shift linkage for my car, and I'm wondering if a lubricant should be placed where the shift rod and rod ends meet. Is something simple like motor oil, grease or WD-40 ok, or is there a certain type of lubricant to use around rod ends? It's a 4130 bare rod and an Aurora carbon steel rod end for reference. Right now there is a medium amount of friction preventing the rod from sliding through the rod end easily.