Not an Ineos axle breakage.

[NQ94]

These pictures are from a FB feed from 4WD TV in Australia. https://www.4wdtv.com.au/ This crew does some difficult four-wheel driving in a live axle Iveco Daily 4x4 truck and produce videos and travel shows for commercial tv stations. Iveco Daily has the larger version of the Carraro axle with mechanical diff locks and are very close in design to the axles used in Grenadier and Quartermaster. The photos are for general interest and research, to illustrate the construction of the axle and that even the strongest looking components have an eventual failure point.

 

[Tinerfeño]

It's not caused by fatique but clearly by excessive force or material failure on inner universal joint. Track rod and drag link look intact. If caused by force possible reasons include:

• Front diff lock engaged, steering at full stop and good traction on both front tyres causing huge internal force on front axle.
• Front diff lock engaged, steering at full stop and opposite tyre in air causing maximum driving force to this side.
• Steering angle stop bolt failure or adjustment over threshold.

If this would happen to me in the outback and no spares would be available my survival plan would be:

• Remove broken drive shaft parts (half shaft parts) from inside the swivel housing.
• Block differential oil escaping to swivel housing.
• Put knuckle back.
• Force front diff lock on by a jump wire (if electrically operated).
• Get back home on 3 x 4.