What Causes the Transmission to Make Noise When the Throttle is Released?
2 Answers
There are several reasons why the transmission makes noise when the throttle is released: 1. Bearing wear: Wear and damage to the bearings. When bearings wear out, their clearance increases, and their fitting precision decreases. When bearings are damaged, abnormal noise occurs because they cannot operate normally, and this may even damage the transmission components, worsening the issue. 2. Transmission component wear: Wear of transmission components or the use of replacement parts with insufficient precision, such as worn gears or new gears that do not fit properly with the original gears, resulting in excessive clearance. 3. Insufficient lubrication: Inadequate or overly viscous lubricant causing poor lubrication. In such cases, the corresponding lubricant (grease) should be replaced; otherwise, it will accelerate transmission wear and shorten its lifespan. 4. Loose bolts: Bolts on the transmission housing (end cover) may become loose due to vibration during use. Regular inspections should be conducted to prevent this issue.
I've experienced the transmission noise when releasing the accelerator several times. The most common cause is insufficient or deteriorated transmission fluid - aged fluid reduces lubrication, causing gear and synchronizer friction noises. Another major issue could be gear wear or synchronizer damage, especially in older vehicles with over 100,000 km mileage, where loose components amplify the impact noise during throttle release. Some cars may have worn clutch plates causing jerky shifts with clunking sounds. Checking fluid level and quality is the first step - you can learn to inspect the fluid cap yourself; if the fluid appears black or smells foul, it needs replacement. Regular maintenance prevents such issues, as neglecting them may lead to major transmission problems requiring expensive repairs. I always insist on annual checks to prolong vehicle lifespan - that's what matters most.
