Automatic Transmission Grinding
I have an '06 3 with 44,000 miles. I've owned the car for about three months and it's been overall a good car. However, lately I've noticed that the transmission sounds likes it's grinding when it goes into 2nd gear from 3rd. For example, if I am driving and slow down to turn right, when I accelerate after turning, the car downshifts into 2nd, but when it does this it takes 1.5-2 seconds to downshift and during so there is a pretty noticeable, what sounds like a slight grinding sound. I took it to my dealership and because no codes came up, they said nothing was wrong with it. I would really like to know if something is wrong with the transmission as the factory warranty will run out 3/2010. Any ideas of what might be wrong, or is this something that a lot of AT m3 owners have?