The steering box in my '55 2nd series 3100 was nearly empty when I checked after buying the truck. I filled it up with gear oil, and it all ran out on my drive way in a couple of days. Then I had the bright idea of using STP. It ran out on my driveway, just took a little longer. And it made the truck steer very hard. Also when driving the truck the steering would take a set and I would have to keep correcting all the time especially in turns. Then I read about JD cornhead grease here on Stovebolts, and got some from our local dealer in Riverside. Fantastic stuff! It does eventually work(very slowly) its way out my worn steering box bushing and seal, but I can live with that for now. The truck steers and drives so much better with the cornhead grease. It is very slick, Great stuff. $4 a tube, use your regular grease gun and pump it in.
