You are going to have a long and painful learning experience here. Mark these words...NO VW PASSAT GEARBOX WILL SURVIVE 700HP
There is a lot of good info in the kit car world about high HP gearbox options. You might be able to use an inverted G50/20 or G50/50 Porsche gearbox but my money says you will need a ricardo transaxle or other racing gearbox and you will not be able to find an automatic you will end up with a six speed sequential unless you want to spend upwards of $25k.
__________________
2001 Boxster S 3.6L, Zeintop
"Calling upon my years of experience, I froze at the controls." - Stirling Moss
|