I was able to rebuild one side today...tore it all down and replaced the grease after cleaning everything real good. bearing grease in the gears and lithium in the tubes. Much smoother and no more lag. Will work on the other side tomorrow and hopefully get them both installed this weekend. Oddly i noticed that my front and rear jacks are slightly different than those in these pics. Where your base has an empty hole exposing the jack bottom...I have a screw in that hole that holds the cover on the jack. Otherwise it looks about the same.