I have a 2003 Jeep Wrangler X with 135.000 miles. Like many of you I started hearing a squeaking noise with vibration when accelerating from a stop. As I got up to spread the noise would go away but the vibration would remain. I did a ton of research and heard about the “angry sparrow” syndrome that plagued many of our beloved wrangler. Yesterday I removed my rear drive shaft and replaced both Universal joints with DANA 513101X Universal with zerk fittings ($21.79ea) from Rockauto.com. I used a 20 ton press that I bought at Harbor Freights and the job was fairly simple and took about 2 hours. Both the sqeak and vibration are gone and the Jeep runs great. I can’t guarent this will resolve your “angry sparrow” but it did fix mine. I hope this helps
