What gears do I have?
is stamped 3.07. Next Dana axles have a bill of material code, which identifies everything in the axle this is stamped into the axle tube itself, and can be hard to spot as its very light. The picture below shows a bill of material stamping. Once you have this number, you can decode it on the Dana website
You can roughly estimate the gear ratio, by jack the rear axle up off the ground and spinning a tire, if the pinion makes 3.5 turns for one turn of the wheel you can figure you have 3.55 ratio.
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Related Writeups: | Differential / Gear Setup Basics | Axle Identification |