All right here’s the scoop. And I appreciate anyone who reads and possibly contribute to this. I have a 2015 RDX with 118,000 miles. A while ago I started hearing some whining noise and buzzing noise when the car would come to a stop. I took the car in to two different places to have a check out. First I took it to Carmax because it has an extended warranty through CarMax. Carmax diagnosed it with a bad transmission. They said they heard of Whining noise and refer me to a different shop. I should say that the transmission shifts very smoothly and then I also have a S vcm disabler on it so I have no issues with it shifting or slipping or anything like that. I took it to a second shop which I was referred to because they took my warranty. They said it was not the transmission and actually the transfer case that was very noisy. Under the warranty I had a new transfer case installed and was sent on my way. Now this process did take over two weeks so I’m very hesitant to go back because I lost my car for a long time. The car drives fine. It’s Shifts smooth, No slippage no other symptoms other than this wine which only seems to happen when I turn the car on in the afternoon and typically I’m very cold days. As soon as I start driving I don’t hear the whine. I have kept up with all the maintenance myself the only thing I have not done is replace the timing belt and water pump (Broke my knee recently so I’ve been unable to do that although I have the parts). Any idea what this wine could be if it’s a common problem. Just looking to see if it might be something else or if I should take it to another shop and see if it is transmission or torque converter related just trying to put my mind at ease.

 

Power steering pump?

 

The power steering is electric on these cars.

 

Could be your timing belt is giving you a warning it's getting ready to go south. If it breaks , your engine is ruined and no warranty in the world would cover that.

 

Hi OP I have this issue too. Sounds like a whining fan to me as I am coming to a stop, usually when it’s colder. I have a 2013 FWD with only 41k miles than I have had since new. Been noticing this for the last few years as far as I recall. It doesn’t seem to affect anything. There is another post recently with someone else having this issue and looking for thoughts as well. Have you found anything?