Fox Remember at the swapmeet that old guy would have a speedometer running there real smooth?? I never tried his snake oil but I thought it would be something thin to work when its cold. My 51 6400 speedo was not working ,had a cable so oiled it put it in speed works miles work 2 speed axle box works. Only trouble is hand rubs on the glass but it will fight its way up there. I felt like thats pretty good for 70 year old equipment !