Hi,
My 2011 jazz cvt also developed a noise, if you search this site you will probably find my posts. Honda wanted over £14,000 for a new gearbox and were totally unhelpful about Information and spares. Finding the correct gearbox is a minefield of differing types. In the end I took the car to vmtp who are auto gearbox specialists who sourced a secondhand gearbox and transferred the parts, the gearbox now works perfectly but it cost me around £2,000. Vmtp are on 01543270555 and are based near cannock, you get a free loan car and I can thoroughly recommend them. I did consider selling my car before the noise became to obvious but adding £2000 to what I would get meant that the new car would cost a bomb.my opinion of honda is unprintable as they obviously want you to scrap your car and buy a new one. If I were you I would speak to vmtp,
Chris