You drained the transmission oil of your Ford Explorer 2002 but it have dipstick where do you put new oil?

The 2002 Ford Explorer's transmission type will determine the fill method. There isn't a universal answer. Some 2002 Explorers have a transmission dipstick, others do not. If yours has a dipstick, you add new transmission fluid through the dipstick tube.

However, before adding any fluid, check your owner's manual to confirm the type of transmission (e.g., 4R55E, 5R55E, etc.) and the correct procedure. The manual will specify the correct fluid type and the proper fill method and amount. Failing to do this could damage your transmission.

If you cannot find the owner's manual, you can search online for your specific transmission type and "fill procedure". Many helpful videos and articles are available.

Important Note: Simply adding fluid through the dipstick tube without understanding the correct procedure is risky. Overfilling can be as damaging as underfilling.