I just had the bearing between the drive shaft and transmission changed and the humming stopped. the first half of the drive train is connected to the second half and there is a sealed unit with a bearing in it. the whole shaft needs to be replaced, you cannot just replace the bearing.
Had the same problem, it turned out to be the sensor switch on the transmission. I was also told to disconnect the battery overnight so all can reset but that did not help in my case.
Answers & Comments
I just had the bearing between the drive shaft and transmission changed and the humming stopped. the first half of the drive train is connected to the second half and there is a sealed unit with a bearing in it. the whole shaft needs to be replaced, you cannot just replace the bearing.
Had the same problem, it turned out to be the sensor switch on the transmission. I was also told to disconnect the battery overnight so all can reset but that did not help in my case.