New project, 86 M1008, 6.2, th400, 208, 60/14, It was rolled over on its roof, but only has 30,00 miles on it. While checking it out I came across this and am not sure of what it is or does. I'm sure some of our M1008 gurus can enlighten me. It's located on the back right side, just in front of the rear axle. The bracketry for it attaches to the right frame rail and the lever towards the rear attaches to a bracket on the rear end. The lines running into and out of it are brake lines.