Problem with quarter window regulator

[skywalker]

My rear quarter window regulators simply refuse to work properly. I've tried 2 sets and htey both do the same thing: roll down fine and when I roll up the bottomr oller simply rips in half, and the regulator pops off track. Any ideas?

 

[jesserose17]

Time to take out the window track / regulator system and clean up the tracks of any hardening grease and put in fresh grease on the tracks.

 

[krash kendall]

Also make sure the rear track isn't twisted, as often happens when a worn vent has been forced to work.

 

[skywalker]

Everything is straight. It seems like the top roller is going int he wrong direction on the down turn.