Make sure to use this one http://www.amazon.com/Red-Line-57904.../dp/B000CPCBF0 . Its the redline 75w-90 for your diff but is the GL-5 instead of the GL-4. GL-4 is fine in your transmission, but not in your diff as JARblue stated.
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Stillen G3, Stillen CBE, Berk HFC, Eibach Springs, H&R Spacers, PW:JDM Knob, RJM Clutch Assembly, Z1 Clutch & Flywheel, Zspeed HD CSC, Stillen Oil Cooler
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