Why does the Audi A4L make a buzzing sound when shifting gears?

[OMiranda]

Audi A4L making a buzzing sound when shifting gears may indicate some transmission issues, such as a malfunction in the transmission gear mechanism. Solutions for abnormal noise when shifting gears in Audi A4L: You can take the car to a 4S shop to have the transmission checked. If there is a problem with the transmission, ask professional personnel to repair it. Methods to prevent abnormal noise when shifting gears: Pay attention to driving habits and avoid operating the gear lever too forcefully; check if the gears are broken or damaged; inspect whether the transmission gear mechanism is faulty; check if the internal bearings are damaged; stabilize the steering wheel when shifting gears—hold the steering wheel firmly with one hand and shift gears with the other, avoiding violently shaking the gear lever back and forth.

[NovaRose]

A couple of days ago, I heard a similar sound while driving my sister's Audi A4L. This 'buzzing' noise during gear shifts mostly comes from the transmission area, especially common in dual-clutch models. It's usually the electromagnetic valve of the shift fork in operation, which is a normal mechanical sound. However, if the sound turns into a 'screeching' with a metallic friction feel, or if there's noticeable jerking during gear shifts, it might be time to change the transmission oil. In older cars, the oil may have oxidized, leading to insufficient lubrication, causing the shift fork to grind dry and make noise. My neighbor's car, which had run 80,000 kilometers, had this issue and became quiet immediately after changing the transmission oil. For cars with electronic gear levers, you can also try restarting the system—turn off the engine, lock the car, wait for ten minutes, and then start it again. Sometimes, a glitch in the program can also cause abnormal noises.

[McClayton]

When repairing Audi vehicles, I often encounter cases of gear shifting noises. Don't panic right away—the A4L's electronic gear lever makes a slight 'buzzing' sound from the gear lock solenoid when shifting. However, if accompanied by vibration or rough shifting, focus on three key areas: worn transmission mounts can cause displacement noises; worn shift fork bearings in dual-clutch transmissions produce high-frequency noise; the most concerning issue is unstable valve body oil pressure causing clutch semi-engagement friction. I recommend paying special attention to sound changes during cold starts—if the noise persists after warming up, promptly check the transmission fluid level. Once, a customer's car had low fluid level causing valve body cavitation noise, which was resolved simply by topping up the fluid.

[ODaisy]

Don't rush to blame the dealer if your newly purchased used A4L has gearshift noises. First, identify the sound source: the electronic parking brake motor makes a 'ziii—' sound when releasing; the steering wheel lock actuator also produces similar noises during unlocking. A single 'zii' sound during gear engagement is likely the gear position sensor self-check. These normal sounds are particularly noticeable in quiet garages. However, if there's persistent abnormal noise or gear lever vibration, immediately inspect the mechatronic unit. Audi's DL382 transmission is prone to oil pressure issues—last month I diagnosed one with shift fork sticking noises, costing over 5,000 yuan in repairs.