The downfall of a Dana 60 is u can only get down to 3.54 gears unlike a 9 inch. But for strength of a posi unit the Dana 60 is hands down stronger. I am running a Tru trac on my street Dana and they must have weigh 40+ lbs for that differential. The 9 inch's diff is not going to be as beefy for sure. But with a spool then a 9 inch will shine. More option and easier to service.
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