Gear damage?

After about 130 000 from 70 KM of howling running noises occur from the Gertiebe.After detailed examination I found that the shaft seal from the transmission housing lies on the shaft.The transmission shows no leaks to see .no oil loss. I close on oil deficiency in the transmission. Perhaps already from the manufacturer. Otherwise the transmission switches and works perfectly. The question is the secondary bearing or the bearing passenger side maybe still ok? Is there experience In one week it goes to the workshop after Renault.that are abzocker. Sell spare parts with 200% surcharge. I insist first on inserting the shaft seal .oil change of the transmission. By the way, nothing of it is in the maintenance book. What kind of a transmission is installed PF 6 ? Would be grateful for hints.