What Causes Abnormal Noise During Transmission Acceleration?
3 Answers
Transmission acceleration has abnormal noise reasons: Bearing wear and damage: When bearings wear, their clearance increases and fitting accuracy decreases. When bearings are damaged, they cannot operate normally, which will produce abnormal noise and may even damage transmission components, leading to further malfunctions. Transmission component wear: Wear of transmission components or use of replacement parts with excessively low precision, such as gear wear or excessive clearance between new replacement gears and original gears. Insufficient lubrication: Insufficient lubrication oil or excessively high viscosity causing poor lubrication. In this case, the corresponding lubricating oil (grease) should be replaced, otherwise it will accelerate transmission wear and shorten service life.
When I first bought my new car, I also encountered abnormal noise from the transmission during acceleration—it made a grating sound that was really annoying. After thinking it through, it was probably due to aging or insufficient transmission fluid, causing inadequate lubrication and gear friction. It could also be worn or loose bearings leading to rough rotation. I suggest first checking if the fluid level is normal; if it's too dirty, change it immediately. If that doesn’t help, inspect the gear wear. Don’t delay—the noise during acceleration can worsen internal damage, and repairs will get more expensive over time, not to mention safety risks. Regular transmission maintenance, like changing the fluid every two years, can prevent a lot of trouble. This is a little tip I’ve picked up from years of driving, shared here for fellow drivers in need.
I've seen many similar issues in repair shops. Transmission acceleration noises are mostly caused by poor oil quality or low oil level, as insufficient lubrication can lead to gear slippage. For automatic transmissions, it might be a broken synchronizer making a clicking sound. A simple method is to check the oil color with a tool—replace it if it's too dark. Bearings or internal wear can also cause squeaking, in which case disassembly and repair are needed. Don't recklessly test acceleration; safety first—stop immediately and troubleshoot. During regular car maintenance, I always check the transmission oil, which extends its lifespan and saves money.
