What Causes the Jerking Sensation When Shifting Gears in Park for Automatic Transmissions?

[BrielleMarie]

The reasons for jerking sensations when shifting gears in automatic transmission vehicles are as follows: 1. Internal clutch pressure loss in the transmission: Check for clutch damage and perform repairs. 2. Blockage or poor flow in the transmission oil passages: Wear in the valve body, long intervals without transmission fluid changes leading to reduced lubrication effectiveness, excessively dirty transmission filters impairing filtration, allowing wear particles to enter the valve body. 3. Incorrect transmission fluid level: Verify whether the transmission fluid is at the standard level. Both insufficient and excessive transmission fluid can cause this issue. Check the transmission dipstick while the vehicle is running to ensure it's at the proper mark. 4. Solenoid valve damage: Sludge circulating in the transmission fluid can block oil passages in the valve body, causing jerking sensations. Prolonged operation under these conditions may lead to transmission overheating, harsh shifting, slippage, and other transmission problems.