* 4-Speed Automatic: This is the more common transmission. Capacity is generally between 12 and 14 quarts However, it's crucial to consult your owner's manual for the exact amount. Some variations exist, and adding too much or too little can damage the transmission.
* 5-Speed Manual: A manual transmission will use significantly less fluid. You'd need to consult your owner's manual for the exact amount.
Always consult your owner's manual for the precise capacity for your specific 1998 Ford Explorer. This is the only reliable source. Using the wrong amount can seriously harm your transmission.