What are the common faults of the 09G transmission?
2 Answers
Common faults of the 09G transmission include: 1. Obvious slipping and jerking when shifting from 3rd to 4th gear; 2. A noticeable dragging sensation while driving, similar to the feeling of a car accelerating again after coming to a complete stop at a traffic light, with significant jerking. The 09G is a 6-speed automatic transmission. Transmissions are divided into manual and automatic types. Manual transmissions mainly consist of gears and shafts, achieving speed and torque changes through different gear combinations. Automatic transmissions are composed of a torque converter, planetary gears, and a hydraulic control system, achieving speed and torque changes through hydraulic transmission and gear combinations.
I've driven cars equipped with the 09G transmission, and the common issues with this type of gearbox mainly involve valve body failures, meaning the hydraulic control unit is prone to damage. This leads to particularly noticeable gear shift jerks, giving a distinct jolt when the car accelerates. Some vehicles may experience sudden jerks at low speeds, as if being kicked from behind. Dirty or worn solenoid valves are one of the root causes, and oil passage blockages are also common. Problems with the transmission control module (TCM) are even more troublesome, potentially locking the gear in a single position and preventing movement. Oil leakage is quite prevalent in older, high-mileage vehicles, where aging seals cause seepage that must be addressed promptly. I believe regular replacement of dedicated transmission fluid is especially crucial—don't skimp on this expense.
