Gear noise from interrupted cuts on FP2NC

I sometimes get a lot of noise from the vertical head or the gear train when I am using a face mill with a small number of teeth (3) and the cut is interrupted. It sounds like gear slap to me, and I can’t help but think it is not a good thing. Is there anywhere in the gear train where there is an adjustment for gear lash?

There is no sound from the gears when the cutting is mostly continuous, enough that two teeth are always engaged.