When you pull the rear seal out of the case, you want to be very careful not to damage the aluminum housing or the transmission won’t seal after putting it back together. Dibs uses this slide hammer. On the seal end, the slide hammer screws into the rubber of the seal. You can make something similar at home using a screw and some rope. Don’t worry if the screw pulls out of the seal a few times, it happens even with the high-end tool. Be careful not to screw too deep into the seal, as there is a bearing behind it that has to come out the front of the transmission.