1991 1999 ford explorer chilton User Manual

Make sure the transmission is in P(A/T) or in gear on a manual, then FIRMLY set the parking brake
and block the drive wheels.
1. 
Check under the vehicle to see if there is sufficient clearance for you to access the filler plug on the
side of the differential housing. If not you will have to raise and support the vehicle using jackstands
at four points to make sure it is completely level. Failure to support the vehicle level will prevent from
properly checking or filling the drive axle fluid.
2....

If necessary, add the proper grade of lubricant until fluid trickles out
Remove the fill plug and make sure that the gear oil is up to the bottom of the fill hole. If a slight
amount of lubricant does not drip out of the hole when the plug is removed, additional lubricant
should be added. Use hypoid gear lubricant SAE 80 or 90.
4. 
If the differential is a Traction-Lok limited-slip unit, be sure to use 4 oz. of Ford Friction Modifier
C8AZ-19B546-A or equivalent special limited-slip additive with the...

Remove the fill plug, then clean the area around the axle housing cover to prevent dirt from
entering it
Use a wire brush to clean the area around the differential. This will help prevent dirt from
contaminating the differential housing while the cover is removed.
3. 
Position a drain pan under the drive axle.
4. 
Loosen and remove all but two of the cover retaining bolts. Dont lose the axle identification tagLoosen and remove all but 2 of the housing covers upper or side retaining bolts. The remaining...

With the remaining bolts loose, carefully pry out on the cover (to break the seal) and allow the
fluid to drain
Once most of the fluid has drained, remove the remaining bolts and pull the cover from the housing
Once most of the fluid has drained, remove the final retaining bolts and separate the cover from the
housing.
6.  HOW TO USE THIS BOOK
130 DRAIN & REFILL 

To fill the differential:
Carefully clean the gasket mating surfaces of the cover and axle housing of any remaining gasket or
sealer. A putty knife is a good tool to use for this. You may want to cover the differential gears using
a rag or piece of plastic to prevent contaminating them with dirt or pieces of the old gasket.
7. 
Remove any old gasket material from the sealing surfaces then clean them of any residual oil
Install the housing cover using a new gasket and sealant. Tighten the retaining bolts...

Cut-away view of a typical cooling system flow
Click to enlarge
FLUID RECOMMENDATIONS
The recommended coolant for all vehicles covered by this manual is a 50/50 mixture of ethylene glycol and
water for year-round use. Choose an aluminum compatible, good quality antifreeze with water pump
lubricants, rust inhibitors and other corrosion inhibitors along with acid neutralizers.
INSPECTION
Any time you have the hood open, glance at the coolant recovery tank to make sure it is properly filled. Top
of the...

Common cooling system components found on all models (not shown is the water pump)-3.0L equipped ranger shown, other
models are similar
Click to enlarge
To add coolant, remove the lid from the coolant recovery tank ... HOW TO USE THIS BOOK
INSPECTION 133 

... then add enough coolant to attain the proper level as indicated on the tank. Use a funnel to
avoid spills
At least annually or every 12,000 miles (19,000 km), all hoses, fittings and cooling system connections should
be inspected for damage, wear or leaks. Hose clamps should be checked for tightness, and soft or cracked
hoses should be replaced. Damp spots, or accumulations of rust or dye near hoses or fittings indicate possible
leakage. These must be corrected before filling the system with fresh...

contaminated or several years old.
At least once every 3 years or 36,000 miles (48,000 km), the engine cooling system should be inspected,
flushed and refilled with fresh coolant. If the coolant is left in the system too long, it loses its ability to prevent
rust and corrosion. If the coolant has too much water, it wont protect against freezing.
If you experience problems with your cooling system, such as overheating or boiling-over, check the simple
before expecting the complicated. Make sure the...

Periodically remove all debris from the radiator fins
Carefully straighten any bent radiator fins with a pair of needle-nosed pliers. Be careful; the fins are very soft.
Dont wiggle the fins back and forth too much. Straighten them once and try not to move them again.
DRAINING, FLUSHING & REFILLING CAUTION
When draining coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze, and are
likely to drink any that is left in an uncovered container or in puddles on the ground. This...