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Thread: X3 Replace Transfer Case Procedure

  1. #1
    Join Date
    Mar 2016
    Location
    Spooner, WI
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    39
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    2005 BMW X3

    X3 Replace Transfer Case Procedure

    Hello,

    My BMW is currently in a transmission shop, and they are afraid of proceeding with switching my transfer case with a replacement. They are afraid that the car will not start or act correctly if they just switch it out. They have access to the computer and can flash it etc, but are looking for some guidance. Does anyone know if I can just switch cases or if anything with the computer is required? Any links to any resources?

    Thanks!

  2. #2
    Join Date
    Apr 2014
    Location
    Renton, WA
    Posts
    464
    My Cars
    03 540i, 04 X3, 00 328i
    I have the Bentley X3 service manual, which describes the transfer case replacement procedure. Assuming you would only replace the transfer case itself and leave its control module alone, you won't obviously have to re-code the control module to match the car or anything. However, as the last steps in the transfer case procedure is to fill the fluid similar to when one does normal fluid service to it, and then do adaptations reset and new fluid related re-calibration in the control module.
    I've done this re-calibration myself when I did the fluid service, and couldn't do it with INPA - GT1/DIS was able to do it.

    I believe you could drive it without this adaptations reset and recalibration, but it would be good for the long term operation to do it.

  3. #3
    Join Date
    Jan 2016
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    Ca
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    6,981
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    2001 525it
    If they can't replace it correctly why are they working on the car at all

  4. #4
    Join Date
    Mar 2016
    Location
    Spooner, WI
    Posts
    39
    My Cars
    2005 BMW X3
    I live in Northern Wisconsin and cant drive the car to a place with the right experience since the transfer case is bad. I also dont want to pay thousands to fix it. I do trust the shops abilities otherwise. I think Vinyldudes assesment is correct after some further research. I do have a windows XP laptop that Ive been outfitting for BMW software. I think Ill take the chance and have them just replace it and if necessary solve the issue myself with GT1/DIS. Thanks guys.

  5. #5
    Join Date
    Apr 2014
    Location
    Renton, WA
    Posts
    464
    My Cars
    03 540i, 04 X3, 00 328i
    The shop can probably do it, but make sure they don't fill the transfer case all the way up to the fill hole but only put 0.85 qt (if the new transfer case is completely drained) of fluid in.

    I would also ask or make sure they install a new rubber mount (aka transmission mount) to the transfer case. It is a bit of a pain to replace when the transfer case is in place but very easy to do when it is out.

  6. #6
    Join Date
    Mar 2016
    Location
    Spooner, WI
    Posts
    39
    My Cars
    2005 BMW X3

  7. #7
    Join Date
    Apr 2014
    Location
    Renton, WA
    Posts
    464
    My Cars
    03 540i, 04 X3, 00 328i
    Quote Originally Posted by tommymulligan View Post
    I think that's the correct part in the vehicle, but the part number does not match what I would expect it to be for a US model car. Not sure what the differences are if any.

    Here it is on realoem, the part #2, for my X3.

    http://www.realoem.com/bmw/enUS/show...diagId=22_0096

    According to realoem, the part number 22313422956 matches the following EU cars:





  8. #8
    Join Date
    Mar 2016
    Location
    Spooner, WI
    Posts
    39
    My Cars
    2005 BMW X3
    So I had the transfer case replaced. Unfortunately it did not solve the issue i was experiencing, which was a heavy whine underneath once you hit 20mph or so and cant go much faster.

    I did replace the driveshaft previously and never had that "whine" problem before replacing the drive shaft.

    I am not sure what is going on with it, wondering if front differential is messed up. Never had issues with axles or bearings or the transmission and it sounds like something is limiting and whining in the drivetrain.

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