I think the additive is for limited slip clutch pack type differentials? I had a Torsen in a previous car (not a Mustang) and I used 75w-140 in that without issue.
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Thanks Jeff, since the Torsen is all gear driven without clutch packs that makes sense. I'm going with the 75w-140 when I change it.I think the additive is for limited slip clutch pack type differentials? I had a Torsen in a previous car (not a Mustang) and I used 75w-140 in that without issue.
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