What the ?? How are they wearing? That guy does not know what he is talking about. You dont need an impact gun. Take your truck somewhere else. You are supposed to have some pressure on the rubber things, dont completely crush them and dont let them have any play in them and you are good. HOw are you going to get a gun on there anyway?

Onetime I had fairly new Ranchos on my truck. The guy at the alignment shop told me my shocks were bad and need them replaced. I asked why. He said I compressed it and it has not come up in over 20minutes. Ranchos are not gas charged. It will never come up. The guy said "well your truck must ride like sh**." I hope the alignment was good.