Wow, hadn't seen this thread before. Probably the same issue as popeyesides and me. With 5.13s, we're running driveshafts at 4,000+ RPM that are only balanced to 2,000 or maybe 2,500 RPM. I'm looking into high speed balancing options. There are shops that will balance shafts at up to 10,000 RPM. Stay tuned for another episode of "As the Driveshaft Turns".
2005 Rubicon, Currie JJ SA lift with AEV 3" springs.
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