For the front I would just use a hand pump to drain. To pull the cover is a bit more work on the front. Fill with 1.7L (3.6 pints) of 80w90 gear oil.
For the Rear.
Remove the bolts and drain the lubricant from the differential housing.
Remove the differential housing cover.
The machined surfaces on the differential housing and the differential housing cover must be clean and free of oil before applying the silicone sealant. Cover the inside of the rear axle prior to cleaning the machined surface to prevent contamination. Clean the gasket mating surfaces.
CAUTION: Install the differential housing cover within 15 minutes of applying the silicone, or it will be necessary to apply new sealant. Apply a continuous bead of silicone sealant to the differential housing cover.
If possible, allow one hour before filling the axle with lubricant to allow the silicone sealant to cure. Install the differential housing cover.
Position the differential housing cover.
Install the bolts.
Tighten to 45 Nm (33 ft. lbs.)
Service refill capacities are determined by filling the rear axle to the level shown. Fill the rear axle with of rear axle lubricant and install the fill plug.
Tighten to 52 Nm (38 ft. lbs.)
Fill the rear with 2.4-2.5L (5.25 - 5.5 pints) of 80w90. You may have a L/S rear end which would require friction modifier added to that. Some gear oils like the Mobil 1 synthetic have the modifier mixed in the oil.
To determine which rearend and if you have a L/S use this link.