Back window problems

[82BRONCO]

On my 82 bronco the back window doesnt roll up. You hear the motor trying to get it up but nothing happens unless I help it up with my hands. What would i need to change?? Would it be the regulator, motor , I cant know. Thanks

 

[Seabronc]

If you hear the miotor trying to move the window, it's most likely the gear. You can get a new gear from Jeff's Bronco Graveyard http://www.broncograveyard.com

Good luck,