A couple of things you need to look at and consider, one .... make sure that the vent is not obstructed in any way. Two, after you take the drive shaft off, the very next step is to take a center punch and put a reference mark on the pinion, yoke and the nut. When you take it apart, you can easily reassemble and not over torque because you tighten only until all the marks are once again aligned.
And, just as important, keep the impact wrench away when reassembling. You could damage the bearings (brinelling) by the impact wrench pounding the bearings.