Does the Transmission Limitation Function Need Repair?
2 Answers
Transmission limitation function requires maintenance. When a fault has already occurred in the transmission, certain operations will be restricted if you continue driving. Automotive transmissions are divided into two types: manual and automatic: Manual transmissions mainly consist of gears and shafts, achieving speed and torque variation through different gear combinations; automatic transmissions (AT) are composed of a torque converter, planetary gears, a hydraulic torque variation system, and a hydraulic control system. Main functions of the transmission: Changing the transmission ratio to expand the range of torque and speed variation of the drive wheels, adapting to frequently changing driving conditions, while allowing the engine to operate under favorable conditions (higher power and lower fuel consumption); enabling the vehicle to reverse while maintaining the same engine rotation direction; using neutral gear to interrupt power transmission, allowing the engine to start, shift gears, and facilitating gear changes or power output; the transmission consists of a gear transmission mechanism and a control mechanism, and a power take-off can be added when necessary.
Last week my car also displayed this transmission limitation warning, and I immediately had a mechanic check it out, only to realize it wasn't a minor issue. This warning indicates the transmission has detected an abnormality and entered protection mode, most commonly due to valve body sticking causing unstable oil pressure, or abnormal clutch plate wear. Once while cruising on the highway, the gear was suddenly limited - RPMs soared but the speed wouldn't increase, which was very dangerous. I strongly recommend immediate inspection. The mechanic used a diagnostic tool to read the fault code and found the solenoid valve resistance was too high. It cost 800 to replace the valve body and fix the issue. Never delay repairs, or you might end up needing a whole new transmission costing 20,000-30,000. Regular transmission fluid changes can help prevent such problems.
