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Message: [QUOTE="Charles, post: 44312, member: 103"] The first time did you reuse the old crush sleeve? If so, then you very likely might not have had to crush it. And even so, one that's already crushed down is much easier to crush farther. If you crushed a brand new one with an impact..... I just don't know what to say about that. You must live on a different planet than myself, the OP and the one other guy that all report exactly the same information as everyone else outside of interland. Whenever I crush one, it's not even [i]close[/i] to anything an impact would do. It's like... bend the breaker bar a little with both legs and hope it comes back straight when you let off kind of stuff. It makes me wonder if you may have never actually tightened up against maybe an old crush sleeve the first time and just sank the bearings right into the races never touching it, and then maybe on the second go-round got a crush sleeve for the wrong application, or bearing for the wrong application and again never made contact with the crush sleeve. There are different yokes for the 10.25 and the 10.5 axles. The pinions are different lengths as well. If for instance you put the longer 10.25 R&P set in a later housing with the late model yoke, and a master install or separate components for that later housing it's entirely possible that you might tighten the pinion bearings up to spec without ever touching the crush sleeve. In that case you were just bumping the impact against the mechanical lock built in to the pinion nut... In that case the bearings would pre-load against their races and come up with the correct reading, but after a couple months of driving the pre-load would be gone without the crush sleeve backing them up. It wouldn't really make noise or come apart, it would just have noticeable backlash letting off and getting back on the power. [/QUOTE]