What causes noticeable jerking when shifting to D gear in a car?

[OJasper]

Automatic transmission jerking occurs due to persistent internal dirt and impurities, which prevent effective regulation of oil pressure, leading to jerking, impact, and slippage issues. Below is an introduction about gear positions: 1. Matching: Regardless of the gear engaged, when the engine speed reaches or exceeds 2500 RPM, it is necessary to shift up a gear because the gears in the transmission are arranged by size. 2. Technique: While driving, avoid keeping your hand on the gearshift lever for extended periods. Use 1st or 2nd gear to start, ensure gear changes are fully engaged, and always depress the clutch pedal completely. 3. Gear Positions: Automatic transmission cars have five gear positions: P (Park), R (Reverse), S (Sport), N (Neutral), and D (Drive).

[Winifred]

Having driven for many years, I've found that jerking when shifting to D gear is often due to untimely transmission fluid changes. Dirty or insufficient fluid can cause internal component wear—like my previous car, which shook due to blackened fluid. Driving habits also play a key role; if you accelerate too aggressively at startup, the engine can't keep up, causing the transmission to jerk. I recommend checking fluids every two years or 20,000 kilometers, and maintaining smooth driving to alleviate the issue. Don't underestimate jerking—long-term neglect accelerates transmission damage and increases fuel consumption. Regular maintenance is crucial; changing fluid may seem minor but saves major repair costs. If the problem worsens, have a professional check oil pressure and clutch conditions—don't delay.

[McBrooke]

As a new driver, I often experience jerking when shifting to D gear, feeling like the car is being held back. The reason might be improper driving habits, such as frequently accelerating too quickly, causing poor coordination between the engine and transmission. Additionally, aged transmission fluid can lead to unstable oil pressure. A simple check: after starting the car, gently press the accelerator—if the jerking persists, the fluid may need replacement or the clutch might be worn. Driving more smoothly and avoiding sudden throttle inputs can help. Persistent jerking can shorten the car's lifespan and increase repair costs. Regular transmission maintenance is a cost-effective way to prevent issues and ensure peace of mind.

[RonanMarie]

The reasons for jerking in D gear include uneven wear of the internal clutch plates in the transmission and unstable oil pressure causing jumps. Contaminated fluid is the main cause, and it should be replaced if it turns black. Regular transmission maintenance is crucial, as problems often arise after driving 50,000 to 60,000 kilometers. Neglecting this can lead to accelerated component damage and increased repair difficulty. Smooth acceleration while driving can help reduce jerking.