I contacted Harland Sharp and he wasn't surprised at all. I did a search on the internet afterward and it happened to quite a few I read. I sent them all back for inspection and of course they were all good. They gave me a replacement and shipped them all back. I didn't comfortable running them so I sold them and bought T&D shaft rockers and had no other issues. At the time I was only running 200/450 spring pressure and it seen less than 1000 street miles.