Possible causes of vibration when stopping with an automatic transmission:
1. Low gearbox fluid level:
*Transmission fluid is needed to lubricate and cool internal components. Low fluid levels can cause increased friction, which causes vibration.
2. Contaminated fluid in the gearbox:
*Old or contaminated transmission fluid may contain impurities that can block the torque converter and cause vibration.
3. Torque converter wear:
* A torque converter is a device that transfers power from the engine to the transmission. Worn or damaged torque converter can cause vibration.
4. Malfunction of solenoids:
*Solenoids are solenoid valves that control the flow of fluid in the transmission. Malfunctioning solenoids can result in improper shifting or vibration.
5. Wear of internal gearbox components:
* Wear on gears, bearings or other internal components can lead to increased friction, which causes vibration.
6. Engine problems:
* Vibration that goes into the transmission can be caused by engine problems such as misfiring or an unbalanced flywheel.
Diagnosis and elimination:
1. Check the transmission fluid level: Using the transmission dipstick.
2. Change transmission fluid: If the fluid is old or dirty.
3. Test the torque converter: A technician will check that the torque converter is operating correctly.
4. Diagnose the solenoids: Using a diagnostic scanner or multimeter.
5. Overhaul the transmission: If there is significant damage to internal components.
6. Diagnose the engine: If engine problems are suspected, contact a mechanic.
Prevention:
* Change the transmission fluid regularly.
* Avoid sudden acceleration and gear changes.
* Tow heavy loads with care.
* Perform routine maintenance recommended by the manufacturer.