Quote Originally Posted by bimmerd00d
I wonder if your 5th gear is a 1:1 like the one on my 1993 525i US spec with a 3.23LSD. If it is an overdrive 5th gear, you might run into a problem with the engine not being powerful enough to move the car with a lower ratio.
OK, i believe you have an M5x B25 engine, which rear differential would be different to earlier ones.

My gear is std gearbox with OD. and i realize, it will kill the ability to move the car. A M20B25 conversion is also on the way...