Quote Originally Posted by Smoken D View Post
So, do we need to pull out the spring and throw it away? Is the new flex shaft a different size diameter than the old?
No, Diameter seems the same I put my old spring back in the new flex. I ran it for about 15 seconds the way it arrived and it reminded me of my 62 impala convert, when the center carrier u-joint holder broke on the driveline. A lot of thumping, grinding and vibration. After about 15 seconds I took my old spring an put it in. Vibration seemed reduced and the crunching and grinding stopped. To be fair I did have a couple of other machines running and was wearing hearing protection so the noise might have been something else, or even imagined I guess.