Hey Mad dart. I have been running one of these cat gear drives on my 318 for a few hundred miles now. I recently pulled the engine to fix an annoying oil leak. While I was in there I looked at the gear drive and it was showing 0 wear. I am very happy with it and it is staying. I kind of like the sound anyway. For some of you that don't know, what do you think every Cummins has that pulls your race cars every weekend? Gear drive.
