My rear window wiper makes a kind of vibrating noise and I was just curious as what part I need to get. I kind of assume it's a gear with teeth missing or something am I correct? Also, this is my first post here and I found this because I am rebuilding my Blazer that took some front end damage last winter. I will probably have more questions but I am just starting with this. Any good online places you can give me as far as parts and accessories go?

 

If you take the rear wiper arm off, so there is no pressure on the motor, is there still a noise?

BTW it's always easier to find answers if you tell us year, make and model in your post or signature.

Welcome to the forum.

You very well may need a new wiper motor though.