I have used single stage snow blowers for years. Got this 2 stage to try out. Not familiar with them and am wondering about the play in the gear box. This has a shaft that goes through the blower and then into a box on the auger. Spins nice and quiet, with no vibration, but the shaft spins about 1/4 turn before activating the auger. I figured that out turning it over by hand. Haven't actually mounted it on a tractor yet. Am worried about having that much play causing damage when I kick on the pto. Any thoughts out there? Does the box need to be rebuilt?