Originally Posted by
CraigE
Wrong, Ford did not build the 9", they had some input on specs but the diffs were supplied to them by the same company that made Detroit Lockers. Ever wondered why a detroit locker will fit and is almost identical. Found this out when pulling down a mates F100 some years ago. Amazing what a bit of research will uncover. The original doccumentation even stated it was a 9". One of the ones that got through apparently that was not stamped as a Ford, supply issues for a while we believe.