I just bought a used never used four year old Master Tow Dolly. Today I decided to try it out and loaded on my Mazda Miata. When I take turns is bucks likes its notching over to steer. I pulled out the big center bolt which was very tight, cleaned Teflon pads, lubed bolt and put back together. I next loaded my Toyota Corolla and the situation was no better maybe even worse. It seems the tire plate does not move over the Teflon pads smoothly, any ideas?