I have a 2004 6 Cylinder 4wd Toyota Tacoma and when the temperature seems to be below 20 degrees, I hear a chirping noise coming from the rear of the truck. It starts when you hit around 30 mph to about 50mph and only when you feather the gas pedal. (The noise goes away when you coast or accelerate fast) I believe it has something to do with the driveshaft. If someone could please help me fix this noise problem? I have heard of a 2002 Tacoma having the same problem. Thanks!