CHECK ME see if i'm right just guessing you ordered 5.29 gears most is part # plus part spec.s yg-tv6-529 is pinion 6 teeth on pinion matched to set 529=5.29 ring gear 2.460 rotation of pinion for 1 rotation of ring gear ??
and so on with ring gear #'s think hard to say how manufacturer doe's it they are all differant ..
yukons are supposed to be good did u pay alot usually u get what u pay for i payed cheap $300. per set 4.88 gear from seirra western or something i dont remember they sound good put crush sleeve eliminators in from allproofroad.com
peace shannon