When your son is in Melaka,try the proton service Centre at peringgit point close to Hospital Melaka and Manipal. The problem in the rubber band impact when the gas pedal is pressed in which the motor RPM jumps around 5000 RPM and stays there, triggering noise that can be read https://gearbox-cvt-proton28383.nizarblog.com/34114509/the-definitive-guide-to-gearbox-cvt-proton