What Are the Symptoms of a Faulty Automatic Transmission?
1 Answers
The symptoms of a faulty automatic transmission are as follows: 1. In addition to difficulty shifting gears, gear slippage, and gear lock, there may also be issues with the mixture being too lean or too rich. 2. A lean mixture can cause difficulty starting, weak driving performance, and engine backfiring. 3. A rich mixture can increase fuel consumption, incomplete combustion, and severe carbon buildup in the cylinders and spark plugs. Specific symptoms include: 1. Difficulty shifting gears, primarily affecting manual transmission models. Some drivers may notice that after shifting into first gear, pressing the clutch does not allow further gear changes, whether upshifting or downshifting becomes difficult. This indicates potential transmission issues, such as insufficient or low-viscosity transmission fluid or problems with clutch linkage. 2. Gear slippage: In a normally functioning transmission, when the car is stationary, the gear should remain in the designated position or within a computer-specified RPM range until the computer initiates a shift. However, if the transmission gears slip automatically, the car may spontaneously jump out of drive into neutral. Drivers should be cautious and promptly visit a 4S shop for repairs. 3. Gear lock, which activates a protective mode. The transmission's computer can detect faults, with higher-end vehicles having more advanced detection capabilities. In such cases, the computer may lock the transmission in third or fourth gear to alert the driver to seek immediate repairs. 4. Transmission damage: A faulty second-stage oxygen sensor may fail to provide accurate data to the engine control unit, leading to a mixture that is either too lean or too rich. A lean mixture can cause ignition difficulties, weak performance, and engine backfiring, while a rich mixture can increase fuel consumption, incomplete combustion, and severe carbon buildup in the cylinders and spark plugs. The engine warning light should illuminate in such cases, and drivers are advised to visit a 4S shop for inspection and repair as soon as possible.
