1996 Ford Bronco Owner's Manual - Page 314

If it becomes necessary to remove the reservoir cap, thoroughly clean the reservoir cap before removing it to prevent dirt or water from entering the reservoir. Remove the internal diaphragm and then add only a DOT 3 brake fluid such as Ford High Performance DOT 3 Brake Fluid, meeting Ford specification ESA-M6C25-A. Clutch fluid reservoir Driveline Universal Joint and Slip Yoke The universal joints that come standard with your vehicle do not require lubrication. If your original equipment universal joints are replaced with universal joints equipped with grease fittings, lubrication will be necessary at the intervals shown in the Maintenance Schedule and Record booklet. Your vehicle may be equipped with a constant velocity or double cardan joint at the transfer case end of the driveshaft. The front driveshaft double cardan joint may be fitted with a flush type grease fitting that requires an adapter to permit proper lubrication. Lubricate the drive joint according to the intervals shown in the Maintenance Schedule and Record booklet. 317