Car Complaints: GM 8-Speed Transmission
The GM 8-speed transmission is a popular transmission used in a variety of GM vehicles, including the Chevrolet Silverado, GMC Sierra, and Cadillac Escalade. However, the transmission has been the subject of numerous complaints from consumers, who have reported a variety of problems, including:
- Slipping gears
- Jerking or shuddering
- Hesitation or delayed shifting
- Loss of power
- Complete transmission failure
The National Highway Traffic Safety Administration (NHTSA) has received over 1,000 complaints about the GM 8-speed transmission. In 2018, the NHTSA opened an investigation into the transmission, which is still ongoing.
GM has been aware of the problems with the 8-speed transmission for several years. In 2014, the company issued a software update to address some of the issues. However, the update did not resolve the problems for all consumers.
In 2018, GM announced that it would be extending the warranty on the 8-speed transmission to 10 years or 120,000 miles. The warranty extension applies to all GM vehicles equipped with the 8-speed transmission that were purchased before August 21, 2018.
What are the symptoms of a failing GM 8-speed transmission?
The symptoms of a failing GM 8-speed transmission can vary depending on the severity of the problem. However, some common symptoms include:
- Slipping gears
- Jerking or shuddering
- Hesitation or delayed shifting
- Loss of power
- Complete transmission failure
If you are experiencing any of these symptoms, it is important to have your vehicle inspected by a qualified mechanic.
What are the causes of GM 8-speed transmission problems?
The causes of GM 8-speed transmission problems can vary. However, some common causes include:
- Defective software
- Faulty hardware
- Lack of proper maintenance
Defective software can cause the transmission to shift erratically or to lose power. Faulty hardware can include worn or damaged gears, bearings, or solenoids. Lack of proper maintenance can lead to the transmission fluid becoming dirty or contaminated, which can cause the transmission to malfunction.
How can I prevent GM 8-speed transmission problems?
There are a few things you can do to help prevent GM 8-speed transmission problems, including:
- Keep up with regular maintenance, including fluid changes and filter replacements.
- Avoid towing heavy loads or driving in extreme conditions.
- If you experience any problems with your transmission, have it inspected by a qualified mechanic as soon as possible.
By following these tips, you can help to extend the life of your GM 8-speed transmission and avoid costly repairs.
What should I do if I am having problems with my GM 8-speed transmission?
If you are having problems with your GM 8-speed transmission, the first step is to have it inspected by a qualified mechanic. The mechanic will be able to diagnose the problem and recommend the best course of action.
If the transmission is still under warranty, GM may be able to repair or replace it for free. However, if the transmission is not under warranty, you may have to pay for the repairs yourself.
If you are experiencing problems with your GM 8-speed transmission, it is important to have it inspected as soon as possible. By taking prompt action, you can help to prevent further damage to your vehicle and avoid costly repairs.
