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  #1  
Old 06-16-2012, 12:06 PM
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Help! My X5 is hurting my wallet - stupid gearbox

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.
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  #2  
Old 06-16-2012, 12:35 PM
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Many have had problems with jerking from the automatic transmission. There are many things that can cause it, there isn't one simple fix.

There is no angle sensor on the gearbox. If you have a problem on hills and bumps it is either because
a) you need to apply more torque to overcome the hill, and the shifting control isn't functioning properly (valve body and sensors)
b) the fluid level isn't correct and the transmission sees, in effect, a different fluid level when it is on an incline

Start with b, it is easier. Check the fluid level.

If that doesn't help, changing the fluid is not likely to have any effect. Do it if you like, on the basis that it is the second cheapest thing to do, but I wouldn't bother myself.

I would go to the valve body, and have that overhauled/replaced. You get new fluid along with that. I would do that before considering a teardown of the transmission, ie a full transmission overhaul. The valve body can be done without removing the transmission from the vehicle.
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Old 06-16-2012, 02:04 PM
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Great stuff, thanks. Do you happen to know the cost of a reconditioned valve body in the US? I have a feeling that the quote I had here of about $3k could be a little excessive!

I would like to get it fixed and keep the car, especially as I've already spent a small fortune on it!
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Old 06-16-2012, 03:38 PM
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Have you ever seen the youtube videos of how drivers in you neck of the woods treat cars? Great fun.

Just sayin....
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Old 06-16-2012, 06:27 PM
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BMW X5 Transfer Case Parts : Automatic, Standard Transmission and Transfer Case Rebuild Kits, Cobra Transmission Parts 1-800-293-1848
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Old 06-28-2012, 12:44 AM
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Find an authorized ZF rebuilder shop and have them diagnose it. BMW dealers don't have this capability, they'll just try to sell u a new tranny. Sounds like cracked clutch housing to me, or possibly internal o-ring failure. Either way, a rebuild is likely necessary. Plan on about $3K US, at least that's what it costs here.
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