I wanted to follow up on the posts on the X5 4.8is Transmission slipping / noise between 4th and 5th gear. (code 4F8A)After driving around for 9 months with the problem and babying the car through the shift it is now happening just about every time now even with the babying. Went back to my local BMW independent mechanic this month and they are still guessing what the problem is and leaning towards pulling the transmission. Wondering if anyone out there has come up with a solution. Appreciate your help !