Hi. I am having a problem with my Discovery II 2000. My trany is not shifting to 4th gear. I am getting a code P0734 (incorrect 4th gear ratio). I was told this code is related to a problem with the MAF. I've cleaned and after few miles I get the code back. I am just concern about buying a new MAF just to find out my trany problem is not solved by replacing the MAF. So I am curious to know if anybody had the same issue and was really solved by replacing the MAF. It is still odd to me that a intake sensor can affect the transmission, but what do I know right??