What are the symptoms of overfilling transmission fluid?

[VanCecilia]

Symptoms of overfilling transmission fluid include: 1. More air is drawn into the transmission, causing air blockage at the drain holes on the control valve, leading to poor drainage and gear shifting impact; 2. The fluid level becomes too high, making it easier to come into contact with rotating components during driving. The agitation of the fluid by these components can create bubbles, which, when drawn into the oil pump, result in abnormal oil pressure and reduced lubrication effectiveness; 3. Increased resistance to gear rotation, affecting the transmission's efficiency and reducing its cooling capability. It's essential to add the correct amount of fluid—neither too much nor too little. The fluid level can be checked using the transmission dipstick, with the ideal level being slightly above the middle mark.