The existing clamp tends to ‘migrate’ up the splined driveshaft, putting a constant pressure on the flexplate which in turn pushes the crankshaft into the main thrust bearing. If the clamp is not released on a regular basis (once a year) then the thrust face disintegrates and the crankshaft starts to eat into the main bearing engine web until heat from friction seizes the engine. Dramatic! The Ritech Systems flexclamp sits on the outside of the existing clamp and mechanically holds it so it cannot migrate. The existing clamp then does not need to be checked and released very year. Peace of mind.