9 41 should be the tooth count.
It is9 41 should be the tooth count.
489 is a taper pinion. 8 3/4 after market could be fine or course spline.Spline on pinion rules out 742. Believe 489 is 29 spline? No idea on 8 1/4 or Dana 60. Spline count on pinion may help! Good luck!
Shaft on the pinion tapered or straight. Tough for me to tell from the pic.I got the gears in a bunch of parts but I don’t know what case it’s for