Originally Posted by
xrsi
if you mashed it with a huge press you would not be transmitting either power or torque through it, you would be applying compressive forces to the item, completely different!
a gearbox and diff is indeed a torque covertor but a shaft TRANSMITTS POWER ACROSS IT by experianceing a TORQUE APPLIED TO IT!
I said repeatedly mashing with a press for 4 seconds ( up down up down etc )
Power = Work Done/Time
IMO a propshaft transmits the force applied to it....torque in = torque out. And it's torque that would break it.
Ask any engineer/tuner on here whether they rate gearboxes or driveshafts in terms of BHP or lbft.
Thats all i'm saying. I dont care what Wikipedia says ( altho it does say torque

) I'm talking about how a proper engineer would discuss it.