i purchased a 2007 530i. when it shift from 5 to 6 gear if my rpm are above 3ooo the rpm rev up to 4500 and it give me a real hard shift. i checked my transmission level and u think it was over filled..car running transmission warm a bunch of fluid came out. still having problems. if i shift manual no problem.

 

How warm? Fluid should be 40C for level test IIRC.

 

Not sure of the temp, but it was just warm. the car was level. it was running. I read some post that said to change the shifting solenoid, between 5 and 6 gear if over 3000 rpm , rpm jump up to 4500 to 5000 makes a whining noise and shift real hard, if i keep rpm below 3000 it shift fine.I purchased the 530i about 6 month ago. the first time it happen it would put the car into limp mode. I purchased a code reader and got it out of limp mode and it Has not went back to limp mode but still have problem between the 5 and 6 gear. thanks for the help

 

Sounds like it was overfilled then. Your transmission appears to be a prime candidate for pan/filter, solenoids and seals, along with fluid change. Others with more direct experience may chime in.