hi guys, im just wondering if anyone of you have encountered this type of noise when driving.

Im currently driving a honda crv 2004 auto transmission. What bugs me is when i drive the vehicle theres this high pitch sound dependent to the speed. Lets say it usually happens between 20-40 kph and goes off as soon as you take off your foot from the gas pedal and as soon as it gets beyond 40kph. Other thing, its consistent when i turn on the D/3 and as you speed up the noise becomes thinner and the pitch noise goes higher too.

i went to the dealer and they suspect that its the gear box but they are not sure and recommended that they will take it out for further investigation, but i find no problem when the gear shifts and letting me prepare 3 grand is way too much.

i have a video but im not sure if its loud enough to be heard.

http://www.youtube.com/watch?v=0ZSUOAK0xjY

any inputs would be of great help.