I rebuilt my trans 7k miles ago. I installed a monster ss 4l65 kit in it with a yank 4k. the trans performed great. shifted flawlessly. came up to a redlight and no more 3rd or 4th. smoked the 3-4 clutches. my question is i used an ATSG manual as a guide and it said to remove the 3-4 clutch return springs. could this be the reason for the early failure? I'm considering installing a smart tech input housing kit in it this time. any input is greatly appreciated.