Improper AT transmission maintenance can easily lead to jerking and oil leaks? This guide includes key points such as oil level checks, oil change methods, and condition-based maintenance, along with precautions. Professional and practical, it helps you scientifically maintain your automatic transmission.
一. Changing Transmission Fluid (Core Key Point)
（1）Fluid Selection:
AT-specific transmission fluid must be used (recommended models: DEXRON VI, ATF WS, MERCON LV). Mixing different specifications of fluid is strictly prohibited to avoid damaging the hydraulic valve body.
（2） Replacement Cycle:
Regular Road Conditions: Every 60,000-80,000 km or 4 years (whichever comes first) Severe Road Conditions (Frequent Congestion, Heavy Load/Towing): Shortened to 50,000-60,000 km
（3） Replacement Method:
Prioritize using a flushing machine (oil change rate ≥90%). Gravity oil changes require a top-up every 3 months to ensure oil cleanliness.
（4） Oil Level Check:
After a cold start, idle for 3 minutes (oil temperature reaches 40-50℃). The dipstick mark should be between "MAX" and "MIN". If below MIN, add the same type of oil. Do not overfill.
二. Daily Usage Guidelines
（1）After a cold start, idle for 3-5 minutes before driving. Avoid sudden acceleration when the engine is cold (insufficient lubrication can wear down planetary gears).
（2）Avoid frequent rapid acceleration and deceleration to reduce shifting shock. In traffic jams exceeding 10 minutes, shift to neutral, engage the handbrake, and release your foot.
（3）Hill start procedure: First, shift to N (Neutral) → Engage the handbrake → Release the foot brake → Then shift to P (Park) to prevent stress on the P locking mechanism.
（4） Do not coast in neutral, as this can lead to insufficient transmission fluid pressure and wear on internal parts.
三. Regular Inspection and Maintenance
（1） Monthly:
Visually inspect the external parts of the transmission (oil pan, drain plug, oil line connections) for leaks. Listen for abnormal shifting noises after starting the engine.
（2） Every 20,000 kilometers:
Replace the transmission filter and clean any metal debris attracted by the magnet in the oil pan (excessive debris indicates internal wear).
（3） Fault warning:
If shifting jerks, delays, or dashboard malfunction indicators illuminate, immediately stop the transmission and inspect it. Do not drive the vehicle while it is malfunctioning.
The good condition of an AT transmission stems from scientific daily maintenance. We hope this maintenance guide will provide you with practical reference and help you avoid common maintenance mistakes. Remember, regular maintenance is key to the longevity of your transmission. If any abnormal operating conditions occur, please check and repair them promptly; do not delay. We wish you safe driving and your vehicle always performing well.
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