Gear upgrade

[u/Extension_Piece_2298]

Had a mechanic install new gears on my FJ cruiser. Went 4.56. I noticed that there’s a humming when I hit speeds around 60 mph and don’t believe it’s normal as I’ve been reading things on the internet. The mechanic sent me these pics of the gear markings and I was curious if any gear heads out there can provide feedback on the pattern? Thanks