Transmission Noise problems of the 2008 Lexus RX350

There was a wining sound coming from under the hood. When I started my SUV up in the morning there was a loud wining sound. The sound lowered as the car warmed up, nut when I put the care in drive and accelerated the nous became louder. I took my car in to the dealer they said it has the power steering so I had them replace the power steering pump. But before they returned the car to me they called me and said the noise was still there and that I now needed a transmission overhaul. At 120,000 miles this should not be happening. I was told that they could clean the transmission oil motor pan and that could stop the noise for now. The dealer cleaned oil pan and the noise stopped. I and told that this is a temporary fix and that I will need a new transmission soon. I think if this is happening to others that there should be a recall on the transmission of the 2008 RX 350.