Strange sound from 2500-3000 rpm

Hi guys, I have a 206 model xr 206. There is a problem in the car. When I load the gas in the 2nd and 3rd gear, it sounds like something is rubbing something. When I showed it to the master, he said that he came from the chest, 2500-3000 rpm, but the 2nd gear does not come at 4000 rpm. when I press the gas when the car is not going, there is no sound, but when it is going, the sound comes under load. I observed something like this, when I turn on the air conditioner on level 3 or 4, there is no sound. In another observation, the car does not come when it is cold. why do you think you can share your ideas? thank you. baris.k 2016-02-21 09:25:30

First of all, we would appreciate if you introduce yourself from our welcome members. You need to disassemble the center console where it is a tape recorder and listen to the sound.