Uploaded September 2015 | Updated September 2026, 1 day ago

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So a friend who has done GM ujoints before helped me install the one on the SDL's shaft. Things seemed to go ok, but now there is a vibration above 25 mph. You can see the shaft wobbling by eye.

Could this be caused by having the driveshaft parts out of alignment?

I'm unsure what to try next.