The transmission input shaft seal also known as the front transmission seal keeps fluid from going past the input shaft. The input shaft is slipped into the torque converter depending on the transmission.
Automatic transmission input shaft seal importanceThe seal has two vital sides, the inside and outside of the diameter. The input shaft seals are typically composed of rubber and plastic while others are made of steel. The inner part f the seal has an interference fit along with a spring that keeps tight against the driveshaft. The seal is vital because it can lead to leaking.
Common issues with a failing automatic transmission input shaftA failing transmission input shaft can cause gear oil leaks, excessive noise, and transmission slippage.