The rear wheel bearings, however, on a 2000 Ford Ranger 4x4 *can* be repacked, but this is generally not recommended unless there's a specific reason to suspect damage or contamination. Many mechanics recommend replacing them rather than repacked due to the complexity of the process and potential for damage. They are often sealed units as well, making repacking difficult and unnecessary.
In short: Don't attempt to repack either unless you have a very specific reason and the expertise to do so properly. If you suspect a bearing problem, replacement is usually the better approach for both front and rear.
