; Kits include hard-to-find items needed to assemble Ford 9 center sectionsContains:; Nine pinion retainer shims consisting of one each .005, . 006, .0075, .0082, two .004, and three . 0105; Twelve pinion pre-load shims consisting of one each .005, .006, . 0075, .0082, .009, .020, .030, two .050, and three .010; One pinion spacer .375 thick; One 3/4 -20 Ford pinion nut