It does however the '65 unscrews with the housing and gear as part of the cable. My understanding is that in '66 it switched to a simple screw with the housing and gear being separated so you don't need to replace it.
65 and earlier does NOT unscrew at the transmission. The O Ring basically holds it in place once it’s securely pushed in. On the 65 Barracuda I parted out there was also an exterior clip that bolted to the case. The gear is held in place by a half moon type clip.
