One more time - ALL the physics are needed to understand this...NOT just the one's you're using.
Its a live axle....when one side is stuffed, it applies leverage to the other side...
If I pick up one side of a see saw...the other side is pushed down by the same force, etc.
Trust me...its true.
No shit sherlock... This is true in a regular shackle.
Which part of DIRT verses ASPHALT are you not getting, exactly? Yes, the surface DOES matter. Proof of that? Drive 50 mph on asphalt. Then drive 50 mph on snow. Which one has better traction?