What years and /or models of Colorados / Canyons came equipped with an 8.6 inch rear differential??? I've seen various references to the 8.6 inch differential but have never actually found one in a Colorado or Canyon. The Chevy Trailblazer and its GM counterpart have an 8.6 inch but the axles are wider and have a different wheel bolt pattern. If available, were they made in both the standard Z85 rwd width and the wider Z71 4x4 axle???