The rear window transmission powers the back window so it can move up and down. On most modern vehicles, they are equipped with power window regulators and motors which can fail due to power issues. There are a few symptoms to watch out for if you suspect a failing rear window transmission:
1. Squealing noises when the rear window moves
When you push the button to move the rear window up or down, and the window makes noises and hesitates as it moves, this may be a sign the transmission is about to go out. The window should operate smoothly, so any noise is a symptom that should be addressed immediately. Contact a professional mechanic to have the rear window transmission replaced before it completely fails and damages other parts in the system.
2. Window jerks while moving
If you notice the window does not open or close smoothly, this is another sign the rear window transmission is going bad. It may jerk and make noise at the same time. This is a sign that the window transmission does not have much life left in it. If this is not addressed as soon as possible the window may become stuck in the down setting and become a safety issues.
3. Window stops moving halfway
The rear window may stop moving halfway up or halfway down. It may start moving again after you let the window rest for a minute and cool off, but this does not always happen. The window may get stuck in the position where it stopped. If this happens, the rain, snow, or sun can damage the interior of your vehicle, so the window should be repaired as soon as possible.
4. Window does not move at all
If you push the window switch and the rear window does not move at all, this means the transmission may have already failed and will need to be replaced. Another reason the window is not moving could be an electrical issue. A mechanic can test the voltage of the electrical system to ensure that is not the problem and see if the fault is with the transmission. From there, they can replace the rear window transmission so it is working properly again.
As soon as you hear squealing noises, the window jerks, stops moving halfway, or the window does not move at all, contact a professional mechanic to have it diagnosed. The rear window transmission should be repaired as soon as possible in case you need to use it in an emergency situation, such as climbing out the back of the vehicle. YourMechanic makes getting repairs to your rear window transmission easy by coming to your home or office to diagnose or fix issues. You can book a service online 24/7. YourMechanic’s qualified Technicians are also available for any questions that may arise.
This article originally appeared on YourMechanic.com as Symptoms of a Bad or Failing Rear Window Transmission and was authored by Spencer Clayton.