I'm having trouble unhitching receiver from ball

I routinely lubricate my hitch and ball with a lube especially formulated for hitches.
And I hit the latch/lock mechanisms with silicone or PB blaster to keep it working smoothly.



If it's jammed, after you stop put the truck in park and let it roll back its slop amount, then put it back in drive and just inch forward ('not' enough to move trailer just enough to move the ball back for a better release). sometimes that is enough to push it in front of the release clamp.