Justin370GT

Hi just woundering if anyone can assist? Iv had a 370gt coupe for about 6 months now with 60,000kms and have had an issue with the window drop. The window drop works fine but is noisy and very harsh,as u open the door the window drops very fast and seems to be dropping a tad too far and wen it drops the whole door shakes and once in the car as it raises back up it makes a slight click sound. I'm assuming it's the regulators,cable stretched or just worn out. ? Hope someone can help