Today I decided to go ahead and service my front and rear diffs. I just hit 60k and did just about everything else but the diffs. So today was a good day to get-r-done!
You will need:
#10 hex key (allen key) for the rear diff
3/8's drive extension for the front diff
1 gallon of gear oil (I used what the book calls...I went with Valvoline 80W-90)
Optional (a pump to pump the gear oil into the diffs...this make life much easier and less messy too)
Rear Diff: The Rear has enough room to do the service with out jacking up the SUV.
1: I jacked up the rear of the SUV to make sure I did not have limited slip...which my SUV dose not. I let it back down on it's wheels after I made sure I didn't have limited slip. I know some cars and trucks require an additive if they have limited slip.
2: Crack open the rear fill plug with a #10 (metric allen key) and remove to allow the draining process to go quickly.
3: Place drain pan under diff and remove drain plug. Make sure to get the crush washer...it may stick to the case or stay on the plug...or fall into the drain pan. Clean the drain plug of any sluge and goo and replace the crush washer or use the old one if it is in good shape. Wait till it's done draining and replace the drain plug.
4: Next it's time for the gear oil. I bought a pump at autozone and it was like $5.
5: Pump till it comes out the fill hole up top. Mine took about 2 quarts. Put the fill plug back on and don't over tighten. Check both plugs before you leave the rear and start the front. Wipe any oil that runs down the diff so dirt and dust will not stick to it. I like a clean SUV!
Now the Front Diff:
You may need to jack up the SUV to get under it and have room to work:
1: Remove skid plate that gives you access to the front diff.
2: Locate the drain and fill plugs. Place a drain pan below and crack open the fill plug with a 3/8's extension on a ratchet.
3: Remove the drain plug and clean it from all the goo.
4: Wait for it to drain and replace the plug.
5: Pump the diff full till it comes out the fill hole. Replace the fill plug. Clean the diff with a rag ( I used a bit of brake cleaner to clean it up nice) and wipe it clean. Check the plugs and make sure they are tight BUT DON'T OVER TIGHTEN. Mine took a shade less than 2 quarts. Still had some left in the 1 gallon jug of gear oil.
6: Replace skid plate....and go have a beer and enjoy a job well done!