Gearbox light remains on every time

There's on and off noise coming from sprocket, mostly when accelerating or when approaching stop / stop. It can be too noisy. I don't know what cause this, someone with knowledge please help.

No sound when i press the hon

Good morning, I own a Fiat Uno 98 and the gearbox started making a strange noise, like a scraping or as if something was rubbing. At idle speed, if I press the clutch, the noise disappears. But, when… 

Hello, I have a Nissan Terrano and, when stopped or in neutral, a gearbox noise appears. When clutching or when driving at low or high rpm, the noise disappears. I was told it is a normal noise in the… 

Engine makes ticking noise