I see how to grease the upper one, but how do you grease the lower one, or is it maintenance free??

 

Unscrew the plug that is in there, screw a zerk in and grease it. Take the zerk out, put the plug back in. They do it that way so the zerk does not get hit and mess up the threads in the BJ. All of the tierod ends and BJ's on my 90 Toyota PU were that way when I bought it.

 

Oh, that makes sense. Thanks!