Grinding gears is one of the most common signs of a transmission problem. It means that the clutch isn’t completely disengaging from the engine while the gears are still rotation. There are many reasons this could happen. In some cases with a manual transmission, it’s actually user error. It usually means that one or more of the components has suffered internal damage and you need to replace them. If the problem isn’t dealt with, it will likely only lead to more transmission issues.
Here are 6 of the most common reasons why transmission gears will grind, according to the Central Valley transmission repair specialists at Modesto’s own Ralph’s Transmission:
(*6*)1. Clutch Problems
The most likely culprit is the clutch system. While automatic and CVT transmissions each have their own clutch system, (see reason #2), manual transmissions depend on the driver pressing the clutch pedal to shift. If there are any issues in the clutch assembly or damage to any clutch components, it won’t work right and it’s very common for the gears to grind when shifting.
(*6*)2. Torque Converter Problems
An automatic transmission uses a torque converter and planetary gear system to automatically do the shifting for you as you accelerate or decelerate the vehicle. If you hear grinding while the car is shifting between forward gears, that is definitely a sign of transmission issues and there’s a good chance it’s the torque converter itself. You may physically hear and feel grinding when shifting into reverse, as well, so that’s another symptom to look for.
(*6*)3. Low Transmission Fluid
Another cause for grinding gears is when the transmission system isn’t getting proper lubrication from the transmission fluid. Low transmission fluid, or old and corroded fluid could cause grinding gears. It’s important to get your transmission fluid changed as needed in order to prevent significant internal transmission damage.
(*6*)4. Gear System Damage
Between the gears themselves and the various sensitive components that control shifting between them, there is always a chance that something can become damaged. This can cause grinding noises and other issues when shifting. Sometimes you might only feel the problem when you are shifting between two particular gears. This situation may require a thorough internal inspection of your transmission to find the root cause.
(*6*)5. Other Internal Transmission Damage
An internal inspection may reveal other damaged components that are leading to your transmission concerns. A transmission specialist will be able to let you know exactly what’s wrong and what it will take to repair the transmission. Sometimes, a full custom rebuild of the transmission is recommended because it’s a more complete fix compared to just replacing one or two damaged parts.
(*6*)6. Bad Driving Habits
Last but not least, grinding gears is sometimes the driver’s fault. Anybody who has ever driven a manual transmission car will likely grind their gears while shifting. That’s okay. It happens to everyone at times. If you do this all the while and push your vehicle with aggressive shifting, heavy loads, or crazy driving, it can lead to serious problems. This can lead to transmission and clutch damage.
These are two common reasons why you may hear grinding noises or feel resistance when changing gears. Whether you have a traditional automatic, CVT or manual transmission, you always want to pay attention if the vehicle isn’t shifting smoothly or you hear any strange sounds. If you are having transmission problems in the Central Valley, turn to the transmission specialists at Ralph’s Transmission. We’re here to help!
Call Ralph’s Transmission today at 209.526.1909 or schedule your free transmission inspection online.
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