have an oil leak from the shift shaft oil seal i have a bad feeling it will require splitting the cases to replace anybody out there changed one yet? can the shift shaft be partially retracted without splitting the cases? would'nt have to retract it much to get behond the seal to pull it out but according to the service manual the engine has to come out and cases seperated to get to it seems like there should be an easier way to get to an oil seal any help is appreciated