Rough country 4" lift with boomerang shackles front and back. 32x11.50-15 tires. Only about 200miles and had to replace rear u joints and still have vibration under load and decal. 4:88 gears with Detroit locker in rear with air locker in front. Superior rear axles . And have the death shimmies. I don't want to starve piñon bearings of oil. If there's any thing you need to know please ask.