it would appear the vehicle was travelling with the driver head out with the gun unsecured, turret lock disengaged, and presumeably the the turret was somewhere near 90 degrees to the hull. The force required to shear the traverse drive and spin the turret to that extent denotes it was travelling at some speed.
Turreted CVRT must only be driven head up when gun in crutch, turrect lock on, unless tactical with driver down, and hatch secured
what was the final drive incident?
Terry