and the drive shaft is spinning just as fast as it would befire the OD tanny installation.
Actually it is spinning faster since the rear end is still the same gear. The OD makes the change in the tranny right?
So, the driveshaft is spinning maybe 15% faster than before and faster than it was designed for. Maybe that or the rear end is the limiting factor?
edit: I see what you mean now, you mean the driveshaft spins the same speed at any given mph. Ofcourse the top speed has been increased only compared to engine RPM.
