Thanks for your help. I was thinking the humming from the front may have something to do with the leak…but logically you’re right…it could be anything leaking. The liquid is dark so I’m assuming engine oil. So perhaps they’re two different problems. The leak isn’t as bad as I first thought. I put a pan under the leak last night and had much less than a teaspoon of fluid this morning. I guess a little liquid makes a big spot on a driveway. I’m getting it looked at on Monday.
Thanks again.