However, I had my driveshaft checked even before it was installed, and it was so far off that the guy couldn't even spin the shaft up to speed. So, he straightened it out to have a zero tolerance balance. Since the day it was installed on my car, there have been zero issues with it. I highly recommend this path of work if you buy an aluminum one piece shaft. I'm guessing that it was bent during shipping, and not something the Powertrain was responsible for.