No I know it doesn't have a grease fitting. But if you slide the rubber boot off a little bit you can get full access to the joint. There's no grease, but my concern is, that is a very improtant part, and it's always moving. I wasn't sure if I should just put a little grease on the pivit points of the yoke part of it???
I doubt that it would help very much, but I don't think it would hurt anything either, if you want to do it. Just make sure you get the rubber boot clamped back good so mud and dirt can't get in and stick to the grease and make the joint go bad quicker.