Dana 60 questions

If you are ordering a new S60 rearend then Cass will most likely tell you to step up to the Strange helical gear differential. Did you look at the ordering form on the Strange website? If not you should walk thru the option list. I just ordered a new S60 rearend and I went with the helical differential, I had the longer Ford wheel studs installed, I went with the billet pinion yoke so I can run a speed sensor and I went with 3.23 gears since I wanted a little overdrive out back. My five speed transmission has a super low first gear and then 5th gear is 1:1 so I wanted a higher rear end ratio.

I'm not sure what rear end gears I'd order with your trans. I suppose I'd research the cars that that transmission came in to see what the factory guys did. 3.73 wouldn't be a bad choice but the final ratio will be pretty high with that 0.70 overdrive. I might go with a 3.91 gear ratio but it all depends. I run a 28 inch tire with the 3.23 gears so we might not be that different but I haven't calculated it out.