I just rebuilt a 106 gearbox with all new bearings and seals, I filled gearbox with 140 gear oil. After running it for about an hour I noticed a small puddle of gear oil on top of the deck under the swivel casting slit where the bolt is to adjust deck swivel. Thought maybe it was excess grease from when I lubed swivel prior to assembly so I wiped it off and ran it again, same thing a small puddle of gear oil. All parts are new and seals installed correct. Drive shaft is in good shape with no grooves or burrs. I have not pumped the swivel casting with grease yet but I don't think that would stop a gear oil leak. I'm thinking of packing it with gear grease, thoughts?