So my cobalt LS 2006 has about ~100K miles. Today, literally two hours ago it started making a whirring not whining noise kinda sounds like a vacuum clear sound, its a very faint noise. The noise exists only between 10-25mph, past that it stops. Its not the tires, i put the car in neutral and reved a few times.
I plan on topping off the transmission fluid.
What are the possible problems?