The manufacturer doesn't install lubrication fittings in lube points on the steering linkage or suspension. You can buy metric threaded fittings to grease these points or use a pointed, rubber tip end on your grease gun. Lubricate all joints equipped with a plug, every 15,000 miles or once a year with NLGI No. 2 (Lithium base) grease. Replace the plugs after lubrication.