Quote:
Originally Posted by SR71
the 9" axles are retained by pressed on bearings instead of c-clips eliminating side to side axle play. thus the 9" doesn't suffer from pad knock back and has positive axle retention in the event of breakage.
if you are going to buy aftermarket axles, moser makes a kit that converts the 12 bolt over to 9" ford style axle retention.
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The 9" definitely has pad knock back issues, which is why Mark Stielow and companies like The GMR Co. spent so much time developing ways to eliminate it. Several of our members who track their cars have had issues.
http://thegmr.com/