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stchris356

F11 30d, drive train vibration under hard acceleration

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Hi Guy's, I wonder if anyone has experienced the above?

I have changed to rear prop donut but still the same, any suggestions would be greatly appreciated as It's a hard one to find.

I have tried Dr. Google too but to no avail!

 

TIA

Chris.

 

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Mine had this when the rear tyres were out of balance.  Swapping to my winter set of wheels cured the issue.   I also at first thought it was a drivetrain issue/propshaft out of balance.

If you have a spare set of wheels at hand to try maybe swap over and check.   Or even just try swapping your fronts to rears.   

 

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1 hour ago, Enzo503 said:

Mine had this when the rear tyres were out of balance.  Swapping to my winter set of wheels cured the issue.   I also at first thought it was a drivetrain issue/propshaft out of balance.

If you have a spare set of wheels at hand to try maybe swap over and check.   Or even just try swapping your fronts to rears.   

 

Thanks for that, I'll pop my winters on. Fingers crossed !

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I have noticed a whooshing noise on overrun sound a bit like an escaping boost pressure noise and it seems to be from the middle of the car. Going back to the vibration I would say it sounds exactly like running over a rumble strip and lasts for about 2 seconds. Spoken to Dr. Google but just getting loads of variations from doughnuts on the prop, software from my remap etc. I'm thinking of trying the front doughnut next? Any help would be gratefully appreciated.

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On 10/01/2019 at 19:19, stchris356 said:

I have noticed a whooshing noise on overrun sound a bit like an escaping boost pressure noise and it seems to be from the middle of the car. Going back to the vibration I would say it sounds exactly like running over a rumble strip and lasts for about 2 seconds. Spoken to Dr. Google but just getting loads of variations from doughnuts on the prop, software from my remap etc. I'm thinking of trying the front doughnut next? Any help would be gratefully appreciated.

Any news on this? Is it still an issue? 

I've been experiencing this since I got the car and would also like some direction as to where to start faultfinding. :sad:

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Hi, yes after spending most of the day on my back under the car removing the exhaust and heat shields I noticed the heat shield had been rubbing against the prop shaft on overrun(the rubbing/whooshing noise).

This was because the diff upper mount rubber bush had split, allowing the diff lateral movement on acceleration/deceleration causing the vibration. 

Edited by stchris356
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Hi guys, I've done some work on this issue with no result. <_< 

 

I've had the two rear wheels refurbished. They had some cracks in them and one was buckled. One would've thought that this would solve the vibration ~110kph issue, but alas, no. It made no difference at all. 

The one wheel was badly cracked so I had it replaced with a brand new OEM replacement. 

 

 

 

My next step would be to inspect all the rubber components in the drivetrain, e.g.: diff bushes, prop shaft carrier, gearbox mount, etc. 

DSC_0090.JPG

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On 04/03/2019 at 23:39, bmwf113.0d said:

Wheels look good, great wheel holder too, it it OEM? 

the wheel is OEM bought from BMW dealership in Cape Town. 

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I am scheduled to visit a tire shop tomorrow. They have a Hunter road force balancing machine and they sound confident that they can eliminate the vibration under load as well as the ~100kph vibration. 

 

I will report back tomorrow. 

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