Did somebody say close ratio gearbox??
This friggin' car just rips through the damned gears, straight cut by the sound of it....that or he's sitting on a cordless drill. 
http://bassmintaudio.com/sean/Video/Assen-bmwSTW.wmv

http://bassmintaudio.com/sean/Video/Assen-bmwSTW.wmv
Originally posted by "leadfootedfool"
This explains it pretty good.
http://www.howstuffworks.com/question522.htm
At least the pic in the bottom you can see a straight cut next to a helical cut.
This explains it pretty good.
http://www.howstuffworks.com/question522.htm
At least the pic in the bottom you can see a straight cut next to a helical cut.



Those gears are loud. 