What are the symptoms of a faulty car gearbox?

2 Answers
DelCarmen
08/27/25 5:53am
The symptoms of a faulty car gearbox include: inability to shift gears, car not moving when in D gear, and jerking. Introduction to car gearbox: The gearbox, commonly referred to as the transmission, is divided into manual transmission and automatic transmission. Manual transmissions generally do not experience many faults. Solutions for a faulty automatic transmission: If the automatic transmission makes noise only while driving and is silent in neutral, it is likely due to noise from the planetary gear mechanism. In this case, the automatic transmission should be disassembled to inspect each component of the planetary gear mechanism for signs of wear, broken gears, wear or sticking in the one-way overrunning clutch, and damage to bearings or thrust washers. Any abnormal parts should be replaced.
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StDallas
09/09/25 4:50am
I've driven for many years, and the symptoms of a failing transmission are quite obvious. For example, you might experience jerky or slipping gear shifts while driving, or pressing the accelerator without the car moving, feeling as if it's being held back. There could also be delayed response when shifting into reverse, taking several seconds before the car reacts, which is particularly troublesome when parking. Additionally, you might hear a clunking noise from the gears when making low-speed turns, with the sound gradually getting louder. After parking, checking under the car for oil leaks and stains can indicate pressure issues. Ignoring these signs may lead to loss of control on highways or accelerated wear, resulting in more expensive repairs. I neglected this when I was younger and ended up spending over ten thousand to replace the entire transmission. Now, I recommend regular maintenance, checking the oil color and level. If you notice a burnt smell or the oil is dark and sludgy, take it to a professional shop immediately—safety first.
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