Could the spherical rod end in my adjustable torque arm be transmitting the vibration/harmonic that I've been chasing? It is one of the older versions of the torque arm and the rod end has never been replaced as long as I have owned it (bought it used). Also,what do you think the chances are that it's just the rear end is worn out after 11 years on the same bearings? I'll be replacing the rear U joint this weekend and having the driveshaft rebalanced just to eliminate the possibility. I'm considering having the rear rebuilt along with a new R&P (switch from 3.73 to 3.23) or replacing it as a whole in the hopes that it will stop. I've gone through the entire car and everything else checks out. What do you think?

 

Anyone?