Ive got a 2006 F-250 4x4 and on top of my steering knuckles there is a place to lube or grease. Ive looked in the owners manual and cant find anything about it. My question is what do I lube that spot with?

 

Do you have ESOF?

My 06 doesn't have any grease fittings except on the front axle u-joints.

Are the ball joints original? (are we talking about the ball joints?)
If you have replacement greaseable ball joints ,then regular chasis lube will work fine.

 

Its not on the ball joints I don't think. Its tapped into the knuckle and is longer than a normal zerk? It has a rubber cap over the top. Its about an inch and a quarter long?

 

I will assume then that you do not have ESOF?

I think you are looking at the plug installed in the hole where a vacuum hose would be for ESOF.

That is not a grease fitting.

 

12ozd has it..

that is the fitting for the ESOF 4WD system, which ur truck doesnt have...

 

Thanks for the help guys.
I don't have ESOF so I'm sure thats it.