Hi all, i have a SB 45 17 inch. when i engage i have a loud crunch sound for a split second.I have been chasing this and have renewed the following,new reel bearings,new reel dual sprocket,new real chain,new self align bearing, new corks.All sprockett and shaft keys are firm with no movement at all,clutch halves and inner cone have no cracks or chunks in them and engage/disengage correctly.Reel chain is not loose or overtight.Am at my wits end,any advice is appreciated.