Our Universal 5432 Diesel was hauled out two years ago and reworked due to an oil leaking issue. It appears the issue has returned as a small amount of oil is leaking at the bottom of the bell housing where it attaches to the engine block. The company who worked on the engine previously suggested it may be a, "Rear Main Seal" issue. At first look, it seems if the transmission, bell housing and fly wheel were removed, the rear main seal could be replaced without having to pull the engine again. I wondered if anyone has had this issue in the past, and/or has any suggestions? Thanks for thoughts.