I have a personal problem, after changing my retainer box that was leaking oil, only today that the gearbox is making noise such as bearings or gears bad, and when stepping on the clutch the noise stops. This test done with the car in neutral. What can be rolling in cash, remembering that my retainer was changed as I asked the mechanic who did a review in my gear box and he took apart the gears and switched gears 1 because my 1st sometimes not entered. More is now perfect, making this noise that sounds only on the outside of the car, when he puts his ear close to the driver's side wheel.