What causes the gear shifting noise in Volkswagen Lavida automatic transmission?
2 Answers
Gear shifting noise in Volkswagen Lavida automatic transmission indicates potential issues with the engine or pistons. Relationship between noise and engine speed: The noise only occurs during idle or low-speed operation. Possible causes include: excessive clearance between piston and cylinder wall; overly tight piston pin or connecting rod bearing assembly; excessive clearance between tappet and its guide hole; wear on camshaft profile; sometimes, loose starter causing pulley noise (more noticeable during speed changes). Relationship between noise and temperature: Noise appears when temperature rises and diminishes or disappears when temperature drops. Possible causes include: pre-ignition due to overheating; reversed long/short axis orientation of piston skirt ovality; insufficient piston ovality or too small piston-cylinder clearance; piston deformation; insufficient piston ring clearance.
I've experienced similar issues with my own car—clicking noises during gear shifts are mostly caused by internal transmission problems, likely due to gear wear or deteriorated fluid. The Lavida's automatic transmission uses a dual-clutch system, which is prone to abnormal noises when lubrication becomes insufficient over time. You should first check the transmission fluid; if it's low or has turned black, it needs replacement. Driving habits also play a key role—for instance, avoid shifting gears hastily before the car comes to a complete stop, as this accelerates wear. I recommend testing gear shifts in a quiet area while stationary to pinpoint the noise source: if the sound occurs when shifting from P to R or D, it may indicate clutch or control module failure; if the noise appears during high-speed gear changes, consider bearing or drivetrain component issues. Additionally, thicker fluid in cold weather makes noises more noticeable, so warm up the car before driving. Never ignore this—minor issues left unattended can lead to costly repairs or even compromise driving safety. Regular transmission maintenance is the best preventive measure, especially for vehicles over five years old.
