What is causing my window crank to make noise like this?

[jeremy93ls]

This just started happening out of nowhere a while back. I can feel the popping/vibration through the handle as it rolls up and down. It doesn't appear to be slipping on the little gears, but that what it sounds like. I've lubed the window tracks but it still pops like this. Any ideas?

 

 

 

 

[Mike]

Sounds like the spring needs to be lubricated


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