Bmw e90 323i shudder

[ReddyBMW]

Hi guys
I have a 2011 e90 323i. The car vibrates or gives a shudder at 80 to 100 kms. I had the propshaft replaced but still no luck.
Please could anyone advise on this issue.
Kind regards

 

[akash]

Do you feel the vibration in the steering wheel?

 

[ReddyBMW]

Yes i feel the vibration in the steering wheel and the entire dashboard. The car only vibrates at 80 to 100kms. No gearbox errors shown on dash. I was told that i need to recondition my torque converter and fill new oil in the gearbox by a gearbox company here in Durban. However my mechanic says that filling new oil in a gearbox with old parts will damage the gearbox and cause it to slip. So i am very confused and dont know what to do.
Any help will be appreciated.
Kind regards

 

[ReddyBMW]

I just did balancing yesterday n still vibranting, so something is definitely wrong