After Transmission Flush, Car Jolts: Causes and Solutions
Symptoms of Jolting
After a transmission flush, it is possible to experience jolting or shuddering while driving. This can occur at various speeds and under different driving conditions. Here are the most common symptoms:
– Sudden jerks or jolts when shifting gears
– Vibration or shaking during acceleration
– Hesitation or slipping when changing gears
– Rough or inconsistent gear engagement
– Stalling or engine hesitation at low speeds
Causes of Jolting
The following factors can contribute to transmission jolting after a flush:
Contaminants in Transmission Fluid: If the new transmission fluid is not clean or contains contaminants, it can clog filters and valves, leading to erratic shifting and jolting.
Air Pockets in System: Incomplete bleeding of the transmission system after the flush can trap air pockets, which can interfere with fluid flow and cause pressure fluctuations, resulting in transmission jolts.
Improper Fluid Type: Using an incompatible or low-quality transmission fluid can cause the transmission to malfunction, leading to jolting and performance issues.
Underlying Transmission Problems: The transmission flush may have revealed or exacerbated underlying transmission problems, such as faulty solenoids, worn clutches, or a failing torque converter.
Troubleshooting and Solutions
To troubleshoot and resolve transmission jolting after a flush, follow these steps:
1. Verify Fluid Level and Condition: Check the transmission fluid level and condition using the dipstick. Ensure that the fluid is at the correct level and is clean and free of contaminants.
2. Check for Leaks: Inspect the transmission pan and lines for leaks. Leaks can allow air or contaminants to enter the system, causing jolting and other problems.
3. Bleed Air from System: If air pockets are suspected, bleed the transmission system by following the manufacturer’s recommended procedure. This involves starting the engine, shifting through gears, and gradually increasing the fluid temperature while monitoring for air bubbles in the fluid reservoir.
4. Use High-Quality Fluid: Ensure that the correct type and quality of transmission fluid is used. Refer to the vehicle’s owner’s manual for the specified fluid type.
5. Inspect Transmission Components: If the above troubleshooting steps do not resolve the jolting, have the transmission inspected by a qualified mechanic. They can diagnose underlying problems, such as faulty solenoids or worn clutches, and perform necessary repairs or replacements.
6. Reset Transmission Control Module: Some modern vehicles have a transmission control module (TCM) that monitors and controls transmission operation. If jolting occurs after a flush, resetting the TCM may help re-initialize the system and eliminate abnormal shifting behavior.
Preventative Measures
To prevent transmission jolting after a flush, consider the following preventative measures:
– Use a reputable mechanic or dealership for the transmission flush.
– Ensure that the correct and high-quality transmission fluid is used.
– Replace the transmission filter during the flush.
– Bleed the transmission system thoroughly after the flush to remove any air pockets.
– Check the transmission fluid level and condition regularly and change it as per the manufacturer’s recommended intervals.
– Avoid sudden or aggressive driving styles that put excessive stress on the transmission.
Conclusion
Jolting or shuddering after a transmission flush can be caused by various factors, including contaminants, air pockets, or underlying transmission problems. By following the troubleshooting and preventative measures outlined above, you can minimize the risk of these issues and ensure smooth and reliable transmission operation. If the jolting persists, it is advisable to consult a qualified mechanic for further diagnosis and repair.
