Once you know the rear axle ratio, you can use the following table to determine the towing capacity of your 2000 Explorer 4D 4x4 4.0 SOHC V6:
| Axle Ratio | Towing Capacity |
| ----------|-----------|
| 3.55 | 4,500 lbs |
| 3.73 | 4,750 lbs |
| 4.10 | 5,000 lbs |
If the rear axle ratio of your 2000 Explorer is not listed in the table, please consult your vehicle's owner's manual for more information.