Mystery vibration at 25 mph can't be diagnosed. It's not the front end!

Killer6, I have read it thoroughly and had to stop the bleeding with that shop. A week ago, I told them to check the harmonic balancer and the torque converter. They told me that labor at $70 per hour would cost over the dollar limit that I gave them. As usual, The lead said he didn't believe it was the harmonic balancer. UGH! I'm picking it up on Monday morning. I'm tired of them telling me it's none of the things I suggest. So, it's on me now. I will take my time and work through all the advise on this forum. Time will tell.