Why Is My Car's Transmission Shaking?

Feeling your car's transmission shake can be unsettling, to say the least. It's one of those problems that you can't ignore, and it usually indicates that something is amiss with your vehicle. But what exactly causes this shaking, and how can you address it? Understanding the root causes of transmission shaking is crucial for maintaining your car's performance and ensuring your safety on the road.

Common Causes of Transmission Shaking

Transmission shaking can result from a variety of issues, ranging from minor problems to significant mechanical failures. Here are some of the most common causes:

Worn Out Transmission Fluid
Transmission fluid is essential for lubricating the moving parts inside your transmission. Over time, this fluid can become contaminated or depleted, leading to increased friction and causing your transmission to shake. Regularly checking and changing your transmission fluid can prevent this issue.

Faulty Torque Converter
The torque converter is a vital component that helps transmit power from the engine to the transmission. If the torque converter is damaged or malfunctioning, it can cause vibrations and shaking, especially at lower speeds or when idling.

Engine Misfires
An engine misfire occurs when one or more of the engine's cylinders fail to fire properly. This can cause the entire vehicle to shake, and it often affects the transmission as well. Faulty spark plugs, ignition coils, or fuel injectors can cause misfires.

Worn Out Clutch
In manual transmission vehicles, a worn-out clutch can lead to shaking and vibrations. As the clutch disc wears down, it can slip or fail to engage properly, causing the transmission to shudder when shifting gears.

Damaged Transmission Mounts
Transmission mounts secure the transmission to the car's frame. If these mounts become damaged or worn out, they can cause the transmission to move excessively, leading to shaking and vibrations, especially during acceleration or deceleration.

Diagnosing Transmission Shaking

If you experience transmission shaking, it's essential to diagnose the problem accurately. Here are some steps you can take:

Check Transmission Fluid
Start by checking the transmission fluid level and condition. Low or dirty fluid can indicate a need for a fluid change or potential leaks.

Listen for Unusual Noises
Pay attention to any unusual noises, such as grinding or whining, which can provide clues about the source of the problem. These noises often accompany transmission issues.

Inspect for Leaks
Look for any signs of fluid leaks under your vehicle. Transmission fluid leaks can lead to low fluid levels and cause shaking.

Scan for Error Codes
Use an OBD-II scanner to check for any error codes in your vehicle's computer system. These codes can help pinpoint the exact issue causing the shaking.

Consult a Professional
If you're unable to identify the problem yourself, it's best to consult a professional technician. They have the tools and expertise to diagnose and repair transmission issues accurately.

Preventive Maintenance Tips

Preventing transmission shaking starts with regular maintenance. Here are some tips to keep your transmission in good shape:

Regular Fluid Changes
Follow your vehicle manufacturer's recommendations for transmission fluid changes. Fresh fluid helps keep the transmission lubricated and prevents wear.

Avoid Aggressive Driving
Aggressive driving, such as rapid acceleration and hard braking, can put extra strain on your transmission. Drive smoothly and avoid unnecessary stress on your vehicle.

Routine Inspections
Have your transmission inspected regularly by a professional technician. They can identify potential issues before they become serious problems.

Address Problems Early
If you notice any signs of transmission trouble, such as shaking, strange noises, or fluid leaks, address them promptly. Ignoring these symptoms can lead to more significant and costly repairs down the road.


Keep your car performing at its best with regular maintenance at I-70 Auto Service. Our dedicated team provides expert inspections, repairs, and tune-ups to ensure your transmission stays in excellent condition. Visit us today and drive with confidence!