Why is there a noise when shifting gears in an automatic transmission?

[JayceLee]

Automatic transmission shifting noise may be caused by the following reasons: 1. Lubrication: The release bearing lacks lubricant, resulting in dry friction or bearing damage. 2. Clearance: There is no gap between the release bearing and the inner end of the release lever. 3. Release bearing: Severe oil contamination or dust accumulation between the release bearing sleeve and the guide tube, or fatigue, breakage, or detachment of the release bearing return spring and pedal return spring, causing poor return of the release bearing. 4. Looseness: Excessive clearance between the driven plate spline hole and its spline shaft. 5. Spring: Annealing, fatigue, or breakage of the driven plate damping spring. 6. Rivets: Loose rivets on the driven plate friction disc or exposed rivet heads.

[SanLucille]

I've had a similar issue with my own car. There could be several reasons for noise during automatic transmission gear shifts. The most common one is insufficient or aged transmission fluid - when the oil gets dirty, it can't lubricate smoothly, causing internal gear friction and noise. Another possibility is loose shift linkage or connecting mechanisms, such as worn-out rods or missing screws, which can produce clunking sounds during shifting. There's also a chance that internal transmission components like the clutch or valve body are damaged, usually due to long-term lack of maintenance, resulting in clicking noises. Ignoring these issues may accelerate wear and tear, potentially leading to complete transmission failure. I recommend first checking the fluid level and condition, and changing it regularly - typically every 20,000 kilometers. If the noise persists, have it inspected by professional mechanics as soon as possible to avoid more expensive repairs later.

[DiKira]

Last time when I was driving, there was a strange noise when shifting gears, which was quite concerning. It might be due to insufficient or dirty transmission fluid that needs replacement. It could also be caused by loose shifting mechanisms, such as a loose lever or worn-out connecting parts. In more severe cases, internal transmission components like gears or bearings might be damaged, producing a clicking sound that affects normal driving. I always maintain my car regularly, but occasionally I still overlook things, leading to problems. Loud noises can be distracting, especially on highways, which is dangerous, so it must be taken seriously. I think I should start with the basics, checking the fluid levels and topping it up if necessary, then taking the car to a shop for a thorough inspection to ensure safety. It's important to develop a habit of regular maintenance, such as checking the transmission every six months.

[Kaden]

There are many reasons for noise during automatic transmission gear shifting, such as insufficient or poor-quality oil, which can cause noise due to inadequate lubrication. Worn or loose shift levers can also produce sounds, or internal components like solenoid valves may malfunction and fail to control pressure. Modified cars are prone to issues, such as interference from added electronic devices. The noise can be annoying and may accelerate component wear. I recommend checking the fluids and mechanisms and repairing them promptly to prevent further deterioration.