I had vibration issues with mine initially. My car is lowered, so I installed a bmr uca to dial in the pinion angle and that fixed it right up.
I've put 8000k on since then, no issues.
$539 shipped is definitely a nice price. After I get some slicks I'll probably pick one up myself. You said there wasn't any weights? So it's unbalanced?
Make sure when you install it line the welded weight at the rear of the shaft up with the yellow mark on the rear diff...
just unwrapped the entire shaft....you had me wondering....I was mistaken, there are indeed weights on it....they are smoothly blended into the shaft....so it is balanced...and the yellow mark on the yoke coincides with the weight...
Again, my mistake, it does have weights....:bash:
Also if you ever have to take the shaft out in the future you have a reference mark to put the shaft back in exactly the way it came out...that's critical. I've read to many posts here where guys took there shafts out and threw them back in any which way and suddenly the shaft that was balanced now vibrates!
Black Friday sale going on now until December 15th.....check them out