A Haynes manual makes vehicle maintenance easy and occasionally fun.
The fill port for the front differential on a 2002 Subaru Forester is remarkably hard to access.
Gear oil smells nasty.
The dealership charges about $200 for flushing and refilling the diffs, but it costs about $7 in new gear oil to do it yourself. Both myself and the owner of the Subaru (my friend Mark) think that $193 savings is a good thing.