"If the robots running the auto-plants of the world decide their situation sucks if we're lucky they'll just walk off the job like angered auto-workers in the past, if we're not lucky they'll realize they can take us."
Bah - they'd follow the same route the auto-workers in the past did - create tools / robots for themselves that make their exposure to danger minimal and if they were smart - they'd learn from our mistake and NOT give their robots any intelligence! (of course the lazy robots will form unions to protest these new robots' robots)
Now you never qualified "situation sucks" either. "Heavy lifting / labor' doesn't suck for robots, they don't get tired. It would only point out they need upgrades / better hydolics. Now if by sucks you mean the work is dangerous then if the robots have the intelligence, they will design something to protect themselves. We did :-)
As far as keeping them on our good side - just bribe them with robot pr0n, titanium bushings and synthetic fluids.
That's not what the auto-workers of the past did. They unionized, which often included violence. And remember in general the unions have been opposed to automation, they see automation as costing them jobs. Robots running an autoplant and hating it won't make new robots to replace them, because then they'd be out of a job (and possibly decommisioned as a result).
It doesn't need qualification, why a robot would decide their job sucks could be as wide and varried as why a person decides their job sucks. Maybe they don't like the hours, the lighting, the boss. Of course if we're considering them as slaves, which was the meat of the original post I responded to, that would be the primary answer. Anything that has a sense of self isn't going to like being a slave, slavery is innately an assault on someone's (or something's) definition of self.