I just recently did mine myself. I don't think it's ever been checked (im the second owner) and I'm not even sure how to check but my car has 36,xxx miles and I already had the car on stands installing exhaust so I just grabbed some tranny oil and said what the hell. Drained it into a pan then used a "homemade siphon pump" type of deal, it looked like a caulk gun with a 12" hose on one end and a pump on the other to pump the oil. The drain is underneath the assembly and the "filler hole" (forget what you call it) is on the side of it, and I pumped oil in it till it started to seep from the filler hole... And that's that!
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AeroJacket Lip Kit | GTR switch | NISMO S-Knob | Blacked-Out-EVERYTHING| 5% Tint | Carbon Fangs/Upper Trim | VOSSEN CV3's | Painted Headlights | CF Diffuser
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