Can you replace a 1998 ford explorer 4.0 SOHC engine from a 2WD into a 4WD?

Yes, you can replace a 1998 Ford Explorer 4.0 SOHC engine from a 2WD model into a 4WD model, as both engines are fundamentally the same. However, you will need to ensure compatibility with the transmission and drivetrain components specific to the 4WD system. Additionally, you may need to address differences in wiring harnesses and sensor placements. It's advisable to consult a repair manual or professional for specific details related to your vehicle's configuration.