What does the rear window transmission do? While not all vehicles have rear windows with moveable glas? those that do require a rear window transmission or regulator for the window to open and close. The system has several components that work together to create a smooth up and down (or horizontal in some cases) motion. If the system is bent or broke? you may notice your rear window does not open smoothly - or in some case? does not open at all. How do you know you need your rear window transmission replaced? Your rear window does not open or close when activated Your window falls out of place when opening or closing Your window moves slowly or needs several pushes to close entirely You hear banging or other sounds while operating your rear power windows How are the rear window transmission replaced by a mobile mechanic? The battery is disconnected The door panel is removed to gain access to the rear window transmission Defective rear window transmission is removed Ne? working rear window transmission is installed Battery is reconnected and windows are tested for functionality How important is having your rear window transmission replaced? Having a working rear window provides great air circulation and sometimes access to the back seats and or trunk depending on placement. While not a major safety issu? you may find having a defective rear window transmission is aggravating and inconvenient. Luckily GoWrench can come fix it right in your driveway!