This guy calls me up and says his all original 1976 FLH with only 6,000 original miles was crusin' just fine down the highway and all of a sudden - the tranny exploded. It blew out the ratchet top, and the case and left a crack all the way around the thing - Whoa. The cause I believe is the smaller shifter clutch gear broke - and all hell started after that. For some reason they don't work very good with big chunks of metal flying around in there? It bent the shift fork shaft so bad I had to die grind it into 3 pieces to get it apart. It also ate the mainshaft and chewed up a couple gears.