a&a trans offer a spacer that goes between the piston retainer and rear clutch shell. it is a clutch plate that has the material removed and outside turned down to fit into and remove the slop in the unit. i made my own by just using a wizzer tool to turn down outside. works great. a&a charged $10 for one so i just made my own. also qwkmopardan id correct about the piston pushing out of bore. have seen it a couple of times.