What is transmission shudder? Driving smoothly along the open road and enjoying your car’s power is one of the best feelings.
But sometimes, you might encounter a slight but persistent shaking that leaves you worried and unsure.
In this easy-to-understand blog, let’s explore transmission shudder – what it actually is, how to figure out what’s causing it, and most importantly, how to fix it for good.
What Is Transmission Shudder?
Transmission shudder, also known as torque converter shudder, is a problem that can happen in vehicles.
It causes the transmission to shake or tremble weirdly when the vehicle shifts into overdrive or when driving uphill in overdrive.
The torque converter, a critical part that helps transmit power from the engine to the transmission, is often the main reason behind this shaking.
If left unaddressed, shuddering transmission can cause more damage to the system, leading to costly repairs and decreased overall vehicle performance, including reduced fuel efficiency.
So, getting it checked and repaired promptly is essential to keep your transmission running smoothly.
Transmission shudder stems from problems with the torque converter or low/contaminated transmission fluid, which can accumulate into shifting solenoids and the transmission valve body.
So it’s important to change the fluid regularly and use the original fluid made for the transmission.
Contaminated Transmission Fluid
One of the main causes of transmission shudder is dirty transmission fluid.
Over time, the fluid can get filled with tiny metal pieces, making the oil thick and preventing proper contact between the transmission plates when they engage.
Regularly following the manufacturer’s recommended transmission service intervals and getting fresh fluid can help prevent such issues.
Unfortunately, many drivers forget about routine maintenance and only take their vehicle for service when it’s already having problems.
This neglect allows the transmission fluid to get dirty over time, leading to problems like shuddering. On top of that, not many drivers know how or when to change their transmission fluid.
Understanding the importance of regular transmission fluid changes and seeking professional help can keep your driving experience smoother and prevent transmission troubles in the long run.
Low Transmission Fluid Levels
When the fluid level is too low, the transmission’s internal parts may not get enough lubrication, which can cause metal shavings and debris to build up in the fluid.
These particles can then move around in the transmission and end up with premature wear on important parts like gears and clutch plates.
Also, low fluid levels can make it difficult for the transmission to shift gears smoothly, resulting in jerky and rough gear changes and shuddering while driving.
To avoid these problems, regularly checking and maintaining the right transmission fluid levels is crucial. If you notice the fluid is low, adding more can help prevent further damage.
Bad Torque Converter
The torque converter is a crucial part of vehicles and plays a vital role in the transmission system. Its main job is to transfer power from the engine to make the vehicle move.
In automatic gearboxes, it acts as a link between the engine and the transmission. The torque converter has five essential parts: the impeller, turbine, fluid, clutch, and stator.
These crucial components work together to transfer power efficiently. When the engine spins the impeller, it pushes the fluid, rotating the turbine.
This connection allows the engine’s power to move smoothly through the transmission, making gear shifts seamless and ensuring the vehicle performs well.
A faulty torque converter is a common recipe for transmission shudder. When it’s not working right, you might notice slipping gears and the transmission getting too hot.
If you see these signs, replacing the torque converter is important to prevent further damage and ensure smooth gear shifting so your vehicle performs well.
How To Diagnose Transmission Shudder?
Diagnosing transmission shudder requires a systematic approach to rule out other potential causes. Before considering an ATF (Automatic Transmission Fluid) flush, it’s essential to check several factors.
- Check the color and smell of the ATF; ensure it’s still red and not brown or burnt.
- Verify that spark plugs or igniter coils are not misfiring and are properly grounded.
- Look for any transmission fluid leaking into the engine coolant.
- Inspect for any wires that rodents may have chewed on.
- Check if brakes are properly installed and ensure correct brake pedal travel.
- Examine for possible leaking heater or radiator hoses.
- Check for clogged fuel filters.
- Read the codes if a “check engine” light is on to understand their meaning.
Ensure all other vehicle systems are working properly before changing the ATF fluid to avoid unnecessary transmission replacements for a cheaper issue.
How To Fix Transmission Shudder?
With the right approach and some basic know-how, you can address transmission shudder and restore smooth driving performance.
Follow these step-by-step instructions to tackle transmission shudder and get your vehicle running smoothly again.
Step 1
Begin by using OBD II (a diagnostic tool) to read the car’s engine codes. This will help identify any potential issues related to the shuddering transmission.
Before replacing any sensors, carefully check the electrical connection’s terminal to ensure there are no loose or faulty connections.
Once a sensor is replaced, don’t forget to reset the check engine light to clear any stored error codes.
Step 2
Next, check the transmission fluid level, color, and odor using the dipstick. Take the stick out, then wipe it using a paper towel or a clean cloth so that you can see the marks clearly.
After that, dip the dipstick back into the housing tube and take it out once more.
Inspect the transmission fluid level indicated on the transmission dipstick against the “Full” and “Add” marks. Add more fluid if the fluid level is below the “Add” mark or is significantly low.
Use your vehicle’s recommended transmission fluid type, as specified in the owner’s manual.
However, if the transmission fluid appears burnt or dark, it’s crucial to replace it entirely to prevent further problems.
Step 3
First, locate the drain bolt and pan under the vehicle and remove the bolt to let the old fluid drain out completely into a container.
Then, clean the drain bolt and pan thoroughly to remove any residue.
Next, replace the transmission filter, which helps keep the new fluid clean and debris-free. Remove the old filter and put a new one in its place.
Now, it’s time to add fresh transmission fluid to the system. Check your vehicle’s manual for the right type and amount of fluid needed.
Usually, around 4.1 quarts of the correct fluid should do the trick. Use a funnel to pour the new fluid into the transmission.
Make sure everything is securely in place and tightened properly. Properly dispose of the old transmission fluid at a recycling center or designated disposal facility.
Step 4
During cold weather, be vigilant for oil leaks from the dipstick tube or transmission fluid slipping.
Additionally, ensure the dipstick is fully inserted in the tube, especially during freezing temperatures, to avoid potential issues.
By following these steps and conducting regular maintenance, you can effectively fix transmission shudders and improve the overall performance and longevity of your vehicle’s transmission system.
Taking proactive measures to address problems promptly will help ensure a smooth and reliable driving experience.
FAQs
What Speed Does The Torque Converter Shudder?
Torque converter shudder typically occurs around 45 miles per hour, causing a momentary shake like driving over a rough road surface.
The sensation quickly disappears but may reoccur under similar driving conditions.
How Long Can You Drive With A Transmission Shudder?
It is not recommended to continue driving with a transmission shudder as it can cause further damage to the transmission.
It is best to diagnose and repair the issue as soon as possible.
Can I Drive With A Transmission Judder?
Never drive your vehicle if you feel the transmission shudder when shifting. Get it repaired immediately to prevent more damage to your car’s transmission and other parts.
The longer you wait, the worse the problem can become, leading to more expensive repairs. Take action promptly to keep your vehicle safe and running smoothly.
Are Torque Converters Repairable?
Yes, torque converters are repairable.
However, the repair process involves using specialized equipment for cutting, measuring, assembling, gluing clutch discs, welding, and ensuring quality control.
This means that repairing torque converters requires technical expertise and specialized tools to be done effectively.
Professional repair shops specializing in transmission work can repair the torque converter to proper working condition, saving you the cost of a complete replacement.
Conclusion
What is transmission shudder? Understanding this and its potential causes is crucial for maintaining your vehicle’s transmission health.
Contaminated transmission fluid, low fluid levels, and a faulty torque converter are some of the primary factors contributing to this problem.
Regularly following manufacturer-recommended maintenance intervals and promptly addressing any issues can help prevent transmission shudder and extend the longevity of your vehicle’s transmission system.
By taking proactive measures and ensuring proper maintenance, you can keep your vehicle running smoothly and enjoy a reliable and safe driving experience.