a link to 901 and 915 gear ratio's that might be usefull to some of you. no idea where i got it from.....
http://www.pelicanparts.com/techarticles/mult_tranny_ratios/mult_tranny_ratios.htm
henry.
whatnow ·
Aussieveedubbers · VW Circuit Racing
porsche gearbox ratio link
https://forums.aussieveedubbers.com/threads/28335/porsche-gearbox-ratio-link