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Discussion Starter #1

i drive a e90 320i 2007, and whenever im in gear the car makes a whining noise. at first i tought it was idler pulley or some kind of pulley. But i did a test, while driving when i put the car in N the noise just goes away. And i also got a jerky transmission when shifting gear, and sometimes revs so high with a delay power to the engine.

Have someone ever experienced this kind of noise?
A bmw mechanic from where i live said that i must change the transmission oil and the transmission solenoids.

i dont want to waste money and discover he wasnt right.
please help me

Best Regards
Note: Im from Maputo, Mozambique.
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