Originally Posted by SLICKTITTLES
With that being said, when you’re downshifting from 3-2, you’re throwing the shifter over too far and missing the opening for 2nd gear-traveling down the line towards reverse. If somehow anyone’s confused by what I just said-look at the beautiful artwork BMW laid out on your shifter.
This was my first thought. It's not that hard to get caught in the reverse gate if you are hamfisting it. You can't push the lever all the way left and down or you can catch the reverse gate and that will definitely feel like you're locked out. You can catch the reverse gate well before actually engaging reverse, especially if you're yanking on the shifter.
If anything on my car the 3-2 downshift is more easily accomplished at high rpm/hard braking.
Tranny fluid change is probably a waste of time.