Off to the tranny shop!

It only took 3 trips to the driveshaft shop to get my vibration to go away. New bushing in the back of the trans and I shimmed the axle. The last time I went there I had to explain that this is going in a race car that spins the driveshaft faster than 3000 rpm... The shaft had to be straightened and rebalanced... This shaft was brand new?? WTF So when I got it back I could see where the weight was, 180 degrees off. Not my fault and no bad vibes now, just had to dot my t's and cross my i's be persistent everything is new. The bad shaft will crack a tailshaft too, be sure to check the bushing and the fit of it on the slip yoke.