The rear diff factory fill is a synthetic. I verified this by looking at the bottle that Nissan dealers use and comparing it to the owners manual.
However, I don't think the gearbox fluid is. The gearbox is also a weak point for our cars. Many already have trouble getting the car into some gears. For mine, from day one, I can't downshift into second gear without some hesitation or crunch.
Last edited by davidyan; 07-26-2009 at 02:30 PM.
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