I will have to say that this is the first time I have heard of that problem. I know we have sold over 100 Z-Traks and I don't think I have ever heard of this happening to any of our customers..........so far. Tom & Beth Smith Mount Airy, MD. Tsmith1499 at aol.com 1942 JD LA 1945 Unstyled AR 1957 720D Standard 1959 JD 435 1961 JD 3010 1969 JD 55 Combine