For the past couple month I’ve been having this strange noise coming from my car. It only happens when the car is cold and hasn’t been started in a while. For example when I leave for work in the morning I don’t hear the rattling noise. But when I leave work and pull onto the street and start accelerating I hear a rattling noise. To me it sounds like a chain rattling on something metal. After about a minute as the car warms back up I don’t hear the noise. I can confirm this is not the engine making the noise. When I was accelerating one day I heard the noise then put my car into neutral and the noise stopped. My car is a 2008 Nissan Altima coupe 3.5 CVT With 80,000 miles on it. I had the CVT fluid changed out at 60,000 miles with Valvoline CVT fluid. Today I checked the fluid while the car was running and up to temperature. It was at the correct level in the hashmarks And the fluid looked clean. Just wondering if anyone else is experiencing this issue? If so what was the issue?