What are the consequences of excessive transmission fluid?

[AvaDella]

Here are the consequences of excessive transmission fluid: 1. If the transmission fluid level is too high, rotating components will come into contact with the fluid during operation. Under the agitation of high-speed rotating parts like planetary gear mechanisms or clutches, the fluid will expand and boil, causing it to leak out from the filler hole and vent valve. 2. It can lead to excessive shift shock as more air gets mixed into the fluid. This can also cause air blockage at the drain holes on the control valve body, resulting in poor drainage and causing shift shock. 3. It can result in low working oil pressure. If the automatic transmission fluid level is too high, rotating components will churn the fluid, creating bubbles. When this aerated fluid enters the oil pump, the pump cannot build up the required oil pressure.