@Frederic you deserve a sincere word of thank you !
yesterday I remembered this wonderful thread and it worked like magic with my X .
I have been in this position ( left front in the air spinning and three wheels in the sand ) before and no matter we tried eventually a tug from the back was inevitable .
yesterday I managed getting my self on same situation ( not on purpose , just didn’t navigate it Finley ) . Got it shoveled and then decided to try the trick , engine off , key out , kill switch off , key in ignition , engine start , 4L , and reverse , and the surprise after three to 4 blips and even only wiggling the steering right and left .. came out ... I could feel the difference that the power instead of going to the spinning aired wheel it went to the other three in traction as if I was in a diff lock ( no diff lock in my X )
cheers 👍