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Old Aug 29, 2009, 10:14 AM   #15
LaXGSR
Evolving Member
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Join Date: Apr 2009
Location: US
Posts: 360

Drives: Evo X GSR

No one seems to have mentioned this, so I will. The rear diff has two fluids. One part uses LSD gear oil, the other uses Diamond ATF SP3. The fill/drain bolts have labels next to them (engraved onto the rear diff) that say "Gear Oil" and "ATF SP3". For some reason, the gear oil has two fill bolts, but you're only supposed to remove one of them. Look in the service manual or in the useful threads in the mitsubishiparts.net forums for a link to the thread that shows how to service the rear diff.

Also, you need a 10 mm hex to remove the drain bolts. Some auto shops label the tool as a disc caliper hex tool too - just make sure it's 10 mm.
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