Some specific questions that were not answered by the archives: 1. Where is the fill point in the top of the engine? 2. What is the G**D***** measurement of the differential side hex plug??!! 8mm is too small; 10mm is too big; I searched and finally found a 9mm at Sears and it's too big!!! Do they even MAKE an 8.5mm? Any other tips/advice? BTW, I am filling with Redline 75W90NS, which a performance place in Knoxville ordered for me. This seemed to be the majority choice in the archives. I am adding some Kendall limited-slip additive also. Thanks to all!