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I was testing, the install on all parts. I just got around 65-67 when I felt the initial vibrations. At the time, we had not done alignment and balancing. We were planning on doing it, just had not gotten to that step. After the initial testing, we did the alignment, and we checked tire pressure and balanced rear tires. The vibration was less, the car was able to get to about 90mph before the vibration started. We attempted to research, found that there had been issues with driveshafts causing vibrations, so I wanted to ask if anyone had similar issues, and what was the solution. I believe it might be because it no longer uses the center bearing that the stock driveshaft uses, but not sure, id rather ask and compare notes.
Still testing today, took everything apart yesterday, that is why I was unable to respond until today. I checked all bolts, marked to see if after driving if bolts loosen. We checked the rear DSS axels to see if that was causing issues. Everything, seems correct, we double checked everything still a strong vibration in the rear of the car at high speed. Trans shifts smoothly, I can feel the rear diff doing it job, the axels do not seem to be loose or pop out of the diff. It comes down to the tires or driveshaft
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