What Causes Loud Transmission Noise?
2 Answers
Transmission noise can be attributed to the following specific reasons: 1. Severe carbon buildup: Carbon deposits can cause incomplete combustion of gasoline, leading to engine shaking. Engine carbon buildup significantly impacts the vehicle, making cold starts difficult, meaning the engine struggles to ignite. Severe combustion chamber carbon buildup can even cause cylinder knocking, produce noises during low-speed acceleration, damage pistons and crankshafts, and lead to engine overheating, severely compromising vehicle safety. 2. Overloaded transmission operation: Overloading the transmission can degrade the quality and frictional properties of transmission fluid, increasing friction and wear, which results in transmission noise. Additionally, sludge (contaminants or dirt) can form inside the transmission (e.g., in the valve body), causing issues like jerking, gear slippage, impact, slipping, abnormal noises, delays, overheating, and oil leaks. If not addressed promptly, the transmission may be rendered useless.
I've been driving for over a decade and have encountered transmission whining issues several times. The most common cause is aged or insufficient transmission fluid - when lubrication is poor, gears and bearings tend to rub against each other, creating noise. Another possibility is severe gear wear, especially noticeable during gear shifts. That's exactly what happened to my car last time - the noise was particularly obvious during city traffic jams. When I took it to the repair shop, they found contaminants in the fluid. After changing to new fluid, the situation improved significantly. Additionally, synchronizer failure can also cause noises - if you hear clicking sounds, it's likely the synchronizer is damaged. I recommend checking transmission fluid regularly and changing it approximately every 40,000 kilometers to effectively prevent these issues. If left unaddressed, persistent noises could lead to more severe transmission damage, resulting in costlier repairs. Safety comes first when driving - get any abnormal sounds checked immediately.
