So, the above failure may or may not have been caused by the wrong bushing/washer combo. It was a result of the nut backing off of the sheer bolt, therefore causing the bolt to back out. When this happened, the arm fell down causing the hub/spindle to shift.
This thread was started a while back when SPC released a new bushing sleeve design. The initial Spec Ride bushing kits (like mine was) contained the bushings, sleeves, and 4 large washers (2 per side). The next Spec Ride bushing kit went to two large bushings (for the outside of each bushing) and two small washers (for the inside of each bushing). This newest design consists of two large washers (still for the outside of each bushing) and new, longer sleeves. With the longer sleeves, you do not need to run inner washers.
The purpose of getting away from the large inner washers was to allow the arm to move more freely when the bushings heat up. When they were not allowed to move freely when heat was introduced, the stress was transferred to the welds. In turn, the welds had the potential to fail.
To answer your question [MENTION=66624]KCcarguy[/MENTION] , if you look at your arms and have large washers on the inside of each bushing, you need to contact SPC to get the newest bushing sleeve update. They will mail them ASAP free of charge and it only takes 1-2 hours to change depending on your skill level.
Hope this helps.