Would you buy the 4th generation MDX if it is going to have the ZF9 speed? I think Honda would prefer to use their 10 speed transmission but may not have this ready in time for the new 4th gen MDX. I think anyone buying a 4th gen MDX with the ZF9 speed is going to get burned when Acura drops this transmission in subsequent years. I don't any any issues with my 9 speed ZF. It is smooth most of the time and gives the occasional squeak. But I just don't trust this transmission.