You can get it by removing the driveshaft, if you can't the driveshaft has to come out before the engine is pulled anyways. It's probably not the bearing itself , either the clamp needs tightening or the bearing is not sitting correct on the shaft itself so the O ring inside seals. However if it is the bearing then you need a new clamp, get everything really clean and dry before you try to clamp the new one in. If someone had the driveshaft out before and then if the bearing was not installed correct it can wear a hole through the rubber holder.