Got a vibration between approx. 1800 - 2000 RPM. Same RPM in every gear regardless of speed. I had the crank turned and a threaded hole cut in it for a bolt to hold the harmonic balancer on. Also, can a 216 balancer fit on a 235 crank?Cause that could have happened. Could it also be the flywheel loose? I need to fix this cause its right in my cruise RPM range. I got a T5 behind a 235 with a 12 bolt 3.73 rear. The vibration was worse and at all speeds and RPMs before I installed a trans crossmember and shimmed the pinion angle a little. Now I'm trying to fine tune it. It's a little scary at 75MPH
