My Rav 4 is making a whining sound when i step on the accelerator and increase the RPM's. What could be making the noise? The engine light has not come on, the rav is noit running hot and I have checked the oils. The whining kinda goes away after driving for a while, the noise does not seem to be affecting performance but my daughter is driving it so I want to find out the problem, any help would be appreciated