hello my name is bau, I have a 2011 honda crv 4wd with 161000 miles. I bough it from a friend that got it new at 98000 miles. it now has a whinning noise when star from 0. everybody tells me is the transmission but I took it on a trip at 1am to tahoe california  2 houers away to check and I did not saw any slipping or problems shifting. all the way was uphill. the noise going foward sounds almost the same as when you go in reverse at a fst pace. any recomendations. I took it to several mechanics and all just told me it has a noise on the transmission and will need to be rebuild or change. this was 30000 miles ago and still have no isues other than the noise. the car was always service at the dealer