Here ya go...
Automatic Transmission
Ford Ranger/Explorer/Mountaineer 1991-1999
It is very important to maintain the proper fluid level in an automatic transmission. If the level is either too high or too low, poor shifting operation and internal damage are likely to occur. For this reason, a regular check of the fluid level is essential.
Although it is best to check fluid at normal operating temperature, it can be checked overnight cold, if the ambient temperatures are 50-95°F (21-35°C). If so, refer to the dots on the transmission dipstick instead of the cross-hatched area and level marking lines.
1. Drive the vehicle for 15-20 minutes, allowing the transmission to reach operating temperature.
If the car is driven at extended highway speeds, is driven in city traffic in hot weather or is being used to pull a trailer, fluid temperatures will likely exceed normal operating and checking ranges. In these circumstances, give the fluid time to cool (about 30 minutes) before checking the level.
2. Park the car on a level surface, apply the parking brake and leave the engine idling. Make sure the parking brake is FIRMLY ENGAGED. Shift the transmission and engage each gear, then place the selector in P (PARK).
3. Open the hood and locate the transmission dipstick. Wipe away any dirt in the area of the dipstick to prevent it from falling into the filler tube. Withdraw the dipstick, wipe it with a clean, lint-free rag and reinsert it until it fully seats.
4. Withdraw the dipstick and hold it horizontally while noting the fluid level. It should be between the upper (FULL) and the lower (ADD) marks.
5. If the level is below the lower mark, use a funnel and add fluid in small quantities through the dipstick filler neck. Keep the engine running while adding fluid and check the level after each small amount. DO NOT overfill as this could lead to foaming and transmission damage or seal leaks.
Since the transmission fluid is added through the dipstick tube, if you check the fluid too soon after adding fluid an incorrect reading may occur. After adding fluid, wait a few minutes to allow it to fully drain into the transmission.
And I almost forgot, welcome to the forum!