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Discussion Starter · #1 ·
I went to order a front locker for my Dana 30 but it said will not fit Dana 30a differentials... How can I tell if its a 30 or 30a my jeep is a 2006 X model 6-speed 4.0
 

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your diff is a d30 ... 30a are the ifs version found on kjs
 

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And one more thing whats a Super Dana 30?
a Super D30 kit is an axle upgrade kit that has 30 spline axles shafts instead of 27 spline. Also stronger chromolly shafts. So if you have a super kit you need a diff setup that accepts 30 spline axle shafts instead of 27 spline shafts.
 
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