Please post a link to this $1200 9" third-member equipped with a 35 spline traction differential.
All Detroit Lockers are sloppy because they have 1/8" internal lash before the ratchet mechanism engages.
I said you can get a S-60 equipped with a high-end, smooth, quiet S-Trac differential for LESS money than a comparable 9" rear built with a sloppy Detroit Locker. As a bonus, the Dana 60 S-Trac is stronger.