Haven't done it on the Commander, on other vehicles, I was able to loosen the nut while the brakes where still installed. And if that is the case for the Commander, I would recommend you try this before pulling the brake. Tighten down a couple of lug nuts over the rotor to hold it tight, have a helper stand on the brakes as you loosen it.
Most DIY'er if they even have air impact wrenches, they are cheapo low power ones, my air impact wrench sometimes can't get all my lug nuts off. So I wouldn't rely on it being able to break loose an axle nut.
As well, if the other three wheels are on the ground, the drivetrain will NOT let the one wheel in the air turn, and the force needed to loosen the nut is NOT even close to the force typically transmitted through the drivetrain.
'BFH', well technically your suppose to use a special tool that is the reverse of a puller. To be honest, I have used a 'BFH' as well and never had a problem. Usually the axle threads don't start till a bit down the shaft, so you won't damage the threads, if NOT, put the nut over the threads so that its flush with the flat surface of the axle end before striking, that will protect the threads.
I have put a dab of anti-sieze on the splines before putting the axle back together with the hub. The next time I did the job, the axle popped right out with a tap from a rubber mallet. Don't use too much, if its all over it will sling into the brakes or worse the sensor for the anti-lock brakes and that could cause all sorts of problems.
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