Hello Guys i have a similar problem on my 328i 2007. i replaced my GM tranmission (automatic) with the same GM 6l45 transmission, but that transmission was taken from a 328i 2009 year model car. everything works great except the ds mode. it engages in DS mode and works fine for 40-50 seconds when i start the car and then it reverts itself in D mode, it does the same on each start. i changed my normal steering wheel with a paddle shifter one, because the 2009 328i had a paddle shifter, it did not fix. then i checked the wires in the shift assembly and all the wires seems okay, then i tried a new shift assembly from the 2009 328i model, still did not fix. I would really appreciate if anyone could help. i've been trying to fix this for 3 weeks already.
P.S sorry for non excellent english. Hope you can understand the situation.
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