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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > Xdrive, rear wheel spin during launch
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      06-29-2020, 04:39 PM   #1
scottred.f32
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Xdrive, rear wheel spin during launch

I have a 2014 435I x drive. Recently when I do a launch or use launch control I get the rear wheels spinning but front stay still. Will also get a stabilization warning and put in to comfort mode. No codes. First BMW so any help will be greatly appreciated.

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      06-29-2020, 04:42 PM   #2
thejeremyman9
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I assume you are not running Xdelete?

It sounds like potentially a T-case issue. Any active or shadow codes?

How many times have you launched the car - a few, dozens, or hundreds?
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      06-29-2020, 04:48 PM   #3
scottred.f32
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No Xdelete, No active or shadow codes, Launched dozens not hundreds, does have 70k on it now bought stock w 50k.
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      06-29-2020, 05:17 PM   #4
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Quote:
Originally Posted by scottred.f32 View Post
No Xdelete, No active or shadow codes, Launched dozens not hundreds, does have 70k on it now bought stock w 50k.
Well the T-case is what is doing the F/R torque split, so that's where i would suspect the issue is, unless perhaps you have an issue with the front axles or something, but i imagine you would hear/know that. Can you the car in the air and just give everything a once over?

I am honestly not sure if there is some ISTA or procedure to "test" the T-case; i imagine there has to be. Might need to do some research on that.

Does it basically seem like you are RWD all the time? Was there a time when it used to launch fine, then all the sudden it did not?
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      06-29-2020, 05:49 PM   #5
scottred.f32
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Only feels like it under hard acceleration will swing in a corner w hard accel. Was no quick on off type feeling or like something broke. I dont launch all the time but I do drive hard. It does spin every time now when launch. Makes it hard to beat those trackhawks!
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