What is the reason why the 2011 Corolla 1.8L model does not move when shifted into gear?

1 Answers
AdalineRose
07/29/25 8:24pm
When an automatic transmission has difficulty shifting gears, in many cases, it is not due to internal valve body damage, but rather due to stubborn dirt and impurities inside, especially when dirt and impurities accumulate inside the valve body, forming blockages that prevent effective regulation of oil pressure, leading to jerking, impact, and slippage issues. At the same time, the issue of high transmission temperature should not be overlooked. Below are the specific details: 1. High Temperature: According to data from the Automatic Transmission Repair Association, "Over 90% of all faulty automatic transmissions are caused by overheating." High temperatures can degrade the quality and friction characteristics of automatic transmission fluid, increasing friction and wear, leading to transmission noise. Additionally, 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. If the temperature rises further, the transmission starts to slip, and slipping in turn causes the temperature to rise even higher. (High-end models like Audi will trigger an alarm and enter transmission protection mode.) If not addressed promptly, the transmission may be irreparably damaged. 2. Solution: Therefore, to thoroughly resolve transmission issues and prevent their recurrence, it is essential to remove stubborn dirt and impurities from the transmission and effectively control the transmission's operating temperature. This is also the key to achieving "transmission fault resolution without disassembly."
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