2007 Night Armor Xterra S
Join Date: Jan 2011
Location: North Carolina
Nevermind, my laptop wasn't loading the top picture, those are installed correctly.
Actual Add-A-Leafs go underneath the leaf pack and help to arch the leaf packs for more lift, these (while they do provide lift) are not the same set up. These are basically an aid for the stock leaf packs, most people use them to help carry extra weight or in the case of the Xterra to bolster the weak stock leaf packs.
As for your vibrations, I highly doubt this is the case as those helper springs shouldn't be giving enough lift to need this but I guess you might need axle shims. Are you running aftermarket shackles? Maybe the helper springs just bumped you up enough that the pinion angle is enough to be causing the vibrations.
I would lean more towards one of the tires not being balanced properly though. You said you had new rims and tires installed, I'd probably look into that first.
Last edited by Killswitch; 08-17-2012 at 11:41 PM.