My car Corolla 2004 Motor 1300 CC Gear Auto in.

My car Corolla 2004 Motor 1300 cc Gear Auto in the case of transition from gear No. 2 to gear No. 3 I hear the voice like the sound of applause iron or a voice like the sound of poor quality gasoline, but I am sure that the sound is not issued by the motor you change spark plugs and oil the motor andair filter, but a continuous sound in the car, especially in the rise of the highlands, such as bridges and sighting and the average speed of 45 to 85 or 90