This is correct.
The (new) open driveshaft one would 'rotate' as the torque tube is now gone.
Orginally the torque tube held it in place, while the springs 'walked' back & forth as their arch changed.
The 'ball shaped' transmission adapter does "rorate slightly" in the transmission's socket, as the driveshaft/torque tube slide in/out.
But It's not part of the rear axle housing.
