GM 6 Speed Transmission Problems You Never Knew!

Are you wondering about some common GM 6 speed transmission problems?

If you are looking to buy this vehicle, or you are being proactive and thinking of what the common issues are so you can be prepared before they happen, you are at the right place.

Today, we will talk about the common transmission problems with the GM 6 speed that not many people are aware of and whether you should be concerned or not. Learn more about the common reasons behind these problems and what you need to do about them. Let’s get right into it!

gm 6 speed transmission problems

GM 6 Speed Transmission Problems

Generally, the GM 6 speed is a reliable vehicle. However, it is not exempt from certain issues. Problems may arise every now and then, especially when the vehicle is not at its peak performance. 

So, if you are wondering about these common problems with the transmission, read along to learn more about these.

1. Slow or harsh shifting

Naturally, you want the shifting process to be as smooth and effortless as possible. But, if you are observing a slower or more harsh shifting with your vehicle, then you may be having some issues with your GM 6 speed. For instance, shifting from one gear to the next is not as seamless as it once was.

What you can do is consider replacing your transmission pressure sensor. But if there is no positive result even after doing this, then you may want to inspect the servo assembly of the gear in question. It may be possible that there is an oil leak present, which is causing the issue. Since your gear is essential for your vehicle, then you want to make sure it engages properly. In case it fails to do so, you are definitely encountering an issue with your transmission.

You can also try to check with your mechanic and have the gear’s mechanical component inspected. In addition to this component, you may also want to inspect the transmission’s mechanical components as these can also affect the difficulty in shifting gears. 

Observe for some signs of gear issues such as a gear slip as your drive. If you hear your gear slipping, it is most likely the cause of the problem. You can also check for error codes using a diagnostic code just to be sure.

Then, it may be necessary to replace the gears’ solenoids as these are likely to be worn out. Moreover, the solenoids may not be any good anymore and are damaged. But thankfully, it is rare for mechanical failures to occur with the transmission.

2. Overheating

When you encounter problems with overheating, it means that your transmission is working at an abnormally higher temperature than what is required. Thus, you may be dealing with overheating issues. You may observe for a slow response as you accelerate, in addition to not receiving your desired drive as needed. Some malfunction signals may also be seen on your dashboard.

To address this problem, begin by checking your transmission oil level. If you notice that it is lower than normal, you need to top it up. But if the issue is with dirt or contamination to the oil, you have to drain it first before filling it up.

3. Shuddering and shaking

Another GM 6 speed transmission problems include a shuddering and shaking issue. When the transmission is not working well, you may experience some shaking instead of a smooth drive. This is why accelerating can be a bit troublesome since you cannot speed up without experiencing some shuddering.

To fix this problem, you will have to visit your mechanic sooner than later. Then, the weights responsible for controlling the pulleys will be checked as these are likely to have been worn out and may need to be repaired or replaced.

4. Reverse gear engagement issue

The reverse gear may be failing to engage, which is a sign of a problem with your GM 6 speed. When you observe this issue, it is highly likely that your transmission is acting up. 

A way to address this problem is by having the shifting solenoids inspected and potentially repaired. The mechanical component of your reverse gear is likely to be damaged, thus requiring a replacement.

A mechanic will start by scanning for error codes using a diagnostic tool. Then, depending on the error code, an appropriate repair work may be required.

You should make it a point to change your lubricants including your gearbox oil regularly to save you from serious troubles over time. It is also important to check your owner’s manual to know the recommended number of miles for your vehicle’s servicing work as part of maintenance work.

Read More: GM 2.7 Turbo Engine Problems That You Never Knew

Additional Things You Should Know

Generally, the GM 6 speed transmission is robust and durable. However, problems may arise over time as part of wear and tear. Additionally. You may experience some common problems such as slipping gears and some visible cracks in the housing of your transmission.

This is why it is imperative to visit your mechanic for necessary repair works to your vehicle. When you take your vehicle to a specialist at the first signs of the problem, you will be able to prevent further deterioration from happening. 

Do take note that it is likely for other key components to be impacted by the damage later on. This will lead to additional issues that can result in more expensive fixes because of the problem getting more severe. 

Hence, we highly recommend that you do not delay any signs of problems. Pay attention to the different symptoms we have indicated above. Sometimes, a quick inspection and diagnosis can help determine the issue before it gets worse. Make it a priority to have your vehicle inspected and serviced by a specialist. This way, you can minimize potential damage, downtime, and expensive repairs.

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