Help with front strut

[hereskenny]

I'm changing the bellows on both front struts. I have them off the vehicle and on the bench with a spring compressor on them. The next step is to take off the top nut holding the mounting plate on, but when I turn this the whole on the damper shaft turn too. Any ideas on how I get this nut off so I can break down the strut? thanks

[lash laroo]

i've used an impact gun, all you do is pull the trigger many times in short burst's. but make sure the spring is compressed.hope that helps