Update: After 3 years that I'm trying to figure out what must be done in order to make sure I won't have any problems because of my RAV CVT's "whistle", I'm very close to a solution: CVT gearbox and ECU change (according to the TSB "CP-0046T-0611" I've posted) under warranty (Toyota in Greece provides 3 years factory warranty + 3 years extended warranty)History: I had to go to every local dealer during the last 3 years, trying to find solution to this "whistle". Nobody could. I've sent e-mails to local dealers and the importer, explaining (after a lot of research) what I thought the problem was (wear of the CVT's steelbelt, or wear that the steelbelt causes to the CVT cones). One year ago, a local dealer made some tests (according to central tech dept suggestions). As I realized, with these tests they were looking for valves malfunction, that could mean low oil pressure in the gearbox, causing bad steelbelt lubrication, causing steelbelt wear. According to these tests results there was no problem, so their "conclusion" was that "the "whistle" is normal and is caused by the oil flow inside the CVT gearbox"! Of course I couldn't accept that, so I wrote my objections to the document they gave me (in order to have a written proof). A year passed and -some days ago- I decided to visit the last (4th) local Toyota dealer in my city, in order to do the annual service and try to find a solution to the "whistle" problem.I told them all the story, they read the e-mail I had sent to the others before, they read the TSB I informed them, they heard the "whistle", they asked (and I gave them) all the documents that were prooving I'm reporting the "whistle" & I'm trying to find a solution since 2012, we talked for about 2 hours about it... and they finally decided that they should ask for the CVT gearbox & ECU replacement! Two days later (last Friday) they called to inform me that the replacement under warranty has been approoved! :D Now I'm waiting for them to call me when the spare parts arrive. I hope there will be no unexpected surprises, meaning they'll change the CVT & the ECU under warranty and the "whistle" will finally stop! I'll inform again when everything's over, so that if somebody else has a similar case with his CVT, will know what to do... since there will be (soon enough I hope) my "res judicata"! ;)