there is a special lube. When I ordered mine from Randy's Ring and Pinion they sent me a little bottle of Ford posi lube!!! I complained, but they said it was good stuff. Geez, I still think that was just wrong.
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1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021.
"I can't complain, but sometimes I still do. Life's been good to me so far."
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