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I was on ebay. Whats is the daytona pinion support? Why is it better than stock and what are the differences? Also, I keep seeing 28 and 31 spline when referencing to 9" axles. How do you know what you have and which goes where? Lastly, I keep seeing mention of big bearing. Once again how do you know which you have? Im wondering this because I have a seal leaking slightly, and when I tear it down, I'm going replace axles, go to 4.11's bearings and all that shit. Thanks in advance!!

Josh
 

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not sure but on the spline count...the 9 in came with two different axles...the only way I know to check is to pull an axle and actually count the amount of splines.
 
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