Well I checked the flexplate and it looks ok. I dont see any cracks. I removed the belt and the vibration is still there at 1300 then goes away for 2-3 seconds then comes back and so on. The harmonic balancer seems to be bouncing a little. I noticed it more in the daylight than I did at night. I think it may be time to get the balancer replaced but that will need to wait a bit. The qjet rebuild is getting my money next week .