93 740i - High pitched whining noise in drive train
Just started hearing a whining noise coming from the drive train when I accelerate or decelerate. I know that the pinion seal in the final drive had a leak. So I removed final drive from drive shaft and replace pinion seal and two quarts 80w-90 gear oil.
I can still hear the whining noise? Could this be a bearing in final drive or something in the drive shaft ? Anyone have this symptom with a 1993 740i ? any suggestion would be appreciated. Just replacing everything one step @ time can be costly!