New gears and alot of noise

If the pinion depth is correct as stated on the pinion then the pattern will be correct. The manufacturer of the gears has set the gears to run at that pinion depth, period. If the pattern is wrong then the pinion depth is wrong and not what is specified on the pinion.

If the pinion depth is correct and the backlash is correct and the gear set makes noise it will have to be or purchase another set which could be quieter than the original set.

Chuck