The biggest difference between expensive gears and cheap gears is how precisely/smoothly machined they are. Alloy usa are cheap gears so they will make more noise than the well machines oe spicer gears. A slight howl is normal but I am not hearing it over the internet. If its loud definitely check the lash on both and if you have a scope peak in and check on the gears. Me and and a few of my buddies have installed many sets of usa standard gears which are also cheap and they do make noise but its not really loud.
|.......PBR BEER TRUCK.... ||""\_____\
#5-06 Salvage Rebuild LJ
Metalcloak Bumper, Overline fenders and Corner guards.
3.5" Sus Lift
1'' Body lift and engine lift
#4-98 TJ Sahara RIP :(
#3-42 GPW Project. Currently on hold Sand blasted the body and it was held together by screen and bondo so new Tub needed
#2-88 Comanche Currently getting a frame off rebuild and a 4bt.
#1-1994 Power Wheels Wrangler