You are correct, the T5z is rated at 330 ft lb. My engine is 420 ft lb. Bruce Couture says the 330 ft lb rating is for 100,000 miles, and sensibly driven the T5z should be fine. There are many guys over on FFR forums runnging T5z's behind similar torque (400+ ft lb) ratings. It is said provided you don't power shift them, the T5z will take these levels of power/torque.
So far I have no hint of any problems putting 420 ft lb / 450hp through my T5z, and would make the same choice again because of the superior fit and correct driveline angle of the T5z compared to the TKO.
So far I have no hint of any problems putting 420 ft lb / 450hp through my T5z, and would make the same choice again because of the superior fit and correct driveline angle of the T5z compared to the TKO.
