Since we started building suspension products for the second-generation Xterras, there has been an ongoing struggle to solve an annoying rear driveline vibration issue that cropped up periodically. Although very rare at 2 inches or less of lift, a few individuals were more susceptible than others and just about anyone with more than 4” of rear lift was getting a dull vibration around 35mph. This applied to any method of lifting more than 4”, whether using a mini-pack, shackle