The previous owner of my 04 325Xi had the automatic transmission fluid changed out by a local (non-bmw) shop. I just noticed when the weather got cold that the car rumbles at stop and in drivee. When the car is in neutral, there is no rumble. Its more like a shaking, car needs to go rumble. Once accelerating, the rumble goes away and the car handles nicely. Even when I just let off the brake, the rumbel goes away. I am wondering if this coud be the torque converter...possibly from the incorrect tranny fluid. Perhaps it is thickening up in the cold.
Your thoughts are greatly appreciated
Your thoughts are greatly appreciated