Need info on oil leak, just sent to a BMW specialist for trans problem and oil leak. After $3700 on new transmission and they replaced valve cover gasket, vehicle still leaking oil. Just replaced the front brakes and had vehicle in the air on jack stands and looked for myself, noticed no oil leaking from top of engine down, but noticed oil coming from unit on bottom of oil pan. Can anyone give me any info on this leak and how hard to correct issue.