When I bought my iQ at 36k miles the CVT gearbox was whiny when high load was put on it; such as full acceleration to motorway speed. Once I changed the CVT fluid the noise completely disappeared. The fluid was very dirty and was far from the transparent red wine colour is started its life as. There doesn't seem to be any official Toyota Service Intervals for the CVT gearbox and I think a lot of people assume that they are therefore sealed for life. Given the whine I was experiencing w