I have a 242 that I rebuilt. It has a hack and tap done to it as well. Problem I have is the rear output seal. New seal installed with a very light coating of rtv on the rim. Greased the inside and taped the splines before I slid it on. The inside seems to get kinda hung up on the lock ring grove. Maybe some clear tape tight around the shaft to help it pass through? Next came the lock ring then finally the oil slinger. Still leaks and gives the Heep a nice oil bath underneath. Ordered a new slinger and seal from Chrysler dealer today. Maybe the Napa seal isn't a good one?