man you shouldnt be shattering your nv56 like that with 500 horse. i am a firm believer in cryo'n parts, but you gotta make sure they are authentic nv parts. it would be absolutely a waste of time and money to cryo aftermarket korea/china/taiwan parts. do you know this guy who bulids your trannys? is he trustworthy? authentic nv parts are not easy to come by and are becoming harder and harder to find. guys are stealin the guts out of trannys that come through their shops all the time, and replacing them with korea parts. you would, without a doubt, shatter korea parts if thats what your tranny man used, no matter how many times he rebulids it. find some authentic nv parts, or find a low mileage used tranny. somethin is rotten in denmark if you are shatterin nv56's every 10000 miles. thats my advise.