What Causes the Abnormal Noise in Automatic Transmission When Shifting Gears?

[VanBradley]

Abnormal noise in an automatic transmission when shifting gears is generally caused by a malfunction in the constant-mesh gear shaft or insufficient transmission oil, and it should be inspected and repaired by a 4S shop as soon as possible. Below is some relevant information about automatic transmissions: 1. Oil requirements: Automatic transmissions must use the manufacturer-specified automatic transmission fluid. Manual transmission gear oil, differential-specific oil, or engine oil should never be used in an automatic transmission, as this can lead to severe burning of all clutches and brakes after some time of driving. 2. Transmission oil change cycle: The automatic transmission fluid should be replaced promptly. When changing the oil, ensure the old fluid is drained as thoroughly as possible. The amount of oil added must be strictly controlled. If the clutches or brakes are burnt, the hydraulic system of the torque converter should be cleaned immediately. The hydraulic system has two oil inlet holes, one located at the bottom of the control valve body.