After washing the gears in solvent before installation the numbers were more readable. Backlash (.oo6) was marked on the ring gear. Ended up with a picture perfect pattern with little trouble. I would have to seen a better selection of shims in their install kit but between the factory shims and the ones in the kit everything turned out OK.Good luck. This is probably not going to turn out well. Those cheap gears are just that, CHEAP. I would go for .007 to .009 for the backlash and make adjustments by what the contact pattern says.