Easy step by step guide on how to service an automotive differential, though appearances may very the process is the same on most vehicles.
Difficulty Rating: 4 of 10
Tools and Supplies Needed
Socket and ratchet set
Differential cover gasket
Safety eye wear and gloves
Begin by parking the car and level ground, blocking both front wheels to
prevent movement. Also put the transmission in park, with the emergency brake
set. Even though the rear wheels will be in the air and will not help the
vehicle from moving its a good safety habit.
Step 1 - After the vehicle is safely lifted into the air enough to be able to work on
the differential, start by locating the service cover or drain port of the differential.
Some differentials utilize a drain plug which can be simply removed to allow the
gear oil to drain out. Unfortunately most vehicles are designed with a rear cover
that must be removed to allow gear oil drainage. To remove the cover position a
liquid drain basin directly under the cover and start removing the cover bolts.
While removing the bolts allow the bottom three bolts to be loosened only, this
will help support the cover once the remainder of the bolts have been removed.