My impactor barely fit over the air-spring arms so I didn't need to take them off; regardless, they come off in minutes.
NOTE: If you elect to do this job with the wheels off the coach, the drive-axle assembly will 'freewheel' as you try to turn it. I used a wide-jaw set of Vicegrips to lock & hold it to get the 2-1/8" nut off as can see clamped in place here. It wasn't great but with some messing around it worked.
UPDATE: While trying to do the other side I was unable to get my wide-jaw vicegrips to hold fast while I used the impactor to screw down the big-nut. Drove me nuts. Gotta' figure a better way.
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