Transmission fluid is essential for the proper functioning of a transmission. It helps to lubricate the gears and other moving parts, and it also cools the transmission. If the fluid level is low, the transmission can overheat and be damaged.
A leak in the transmission pan can cause the fluid level to drop, which can lead to transmission problems. If you think that your transmission pan is leaking, you should have it inspected and repaired as soon as possible.