Help! My X5 is hurting my wallet - stupid gearbox

[Dubai_Andy]

Last year I bought a 2006 X5 4.8is and since I purchased it, it's had about $6k spent on it... and now it needs even more money pouring into it.

My latest problem is the gearbox. I've done a load of reading on here plus taken the car to a couple of BMW specialists but I just want to ask the opinion of you all before I shell out the cash.

I get the dreaded gearbox jerks. When the engine is started from cold it's worst. If I put the car in D and just drive as normal, the car will stay in first gear much long than it should which can build the revs up to as much as 4k and then it's will change into second with the most uncomfortable and aggressive gear change you've ever felt. It literally throws you back in your seat.

It sometimes also happens from second the third as well, but it's less harsh.

When the car is warm and even after a long drive, speed bumps or inclines can also cause the very same problem. I guess there is a geometry sensor that measures the and angle of the car?

To prevent all the above happening, I normally spend the first few minutes driving the car in manual mode until the car has warmed up a bit. I always pull away in second from cold too

What I've been advised so far, is that I could try changing the transmission fluid and have the software updated but I'm told that this may not achieve anything. I've been quoted about $400 for this job, here in Dubai. I have been told that if that fails, I could change the valvebody and for the part alone I've been quoted the equivalent of just over $3k.

I really do love the X5, for an SUV the handling really is quite impressive and of course it's quick too... and luxurious, but financially I can't really afford this regular expensive maintenance.

What should I do? Any advice will be very appreciated.