Will a 4.0 motor from a Ford Explorer fit into a 3.0 Ford Ranger?

Will a 4.0 motor from a Ford Explorer fit into a 3.0 Ford Ranger?

Yes but will also need to replace the transmission also due to the bell housings being different and won't bolt to the block

It is a completely different engine, not an easy swap unless you have the whole explorer

Will a 96 4.0 explorer motor fit into a 91 ranger with a 4.0 motor?