I know Kragen has axles for the 123... but i bet they don't have it in stock. i had the problem with my axle and Garrett was with me and spooned heavy axle grease into the joint. (ask Zack he was there LOL) anyway if you still have the rubber boots intact then my suggestion to you is. get a grease gun and some heavy axle grease (the blue chevron type is best) and cut a slit into the rubber on the joint and pump that thing full of that axle grease. I bet you don't hear it again. you'll make it to salt lake easy.

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