This whole time my tranny has been whining through all the gears. Yesterday I was driving and when I stopped I noticed gear oil leaking through the bellhousing, like drip after drip. I was about 30 miles from home so I decided to hurry up and get it home. It got louder and sounded like grinding as I got closer to home. Im assuming from lack of oil in the tranny. but 4th gear will never make any grinding noises or even whine. 4th gear is perfectly normal. I recently changed the throw out bearing and clutch. I thought the TO bearing was making the noise but obviously it wasn't. Im thinking about replacing the whole transmission. Any help would be great. Im stationed in Germany so I have 1989 BMW 520i. 5spd.