What is Gear Clashing?
1 Answers
Gear clashing refers to a situation where the speed synchronization during gear shifting is not optimal, causing the vehicle to fail to proceed at the most suitable speed for the current gear. It is a common malfunction in automatic transmissions. Causes of gear clashing include: 1. Contamination and impurities in the transmission: Many cases of gear clashing, jerking, impact, or slipping in automatic transmissions are not due to internal valve body damage but rather the presence of stubborn dirt and impurities inside. Especially when these contaminants accumulate in the valve body, forming blockages, they hinder effective regulation of oil pressure, leading to jerking, impact, or slipping issues. 2. Transmission overheating: Additionally, the issue of transmission overheating cannot be overlooked. High temperatures degrade the quality and frictional properties of automatic transmission fluid, increasing friction and wear, which leads to transmission noise. At the same time, sludge (impurities or dirt) can form inside the transmission (e.g., in the valve body), causing jerking and impact. If the temperature exceeds 120°C, rubber sealing materials begin to harden, eventually leading to leaks and reduced hydraulic pressure. At even higher temperatures, the transmission starts to slip, and slipping in turn causes the temperature to rise further.