This stock replacement crush collar/sleeve for Ford 9" rear axles from Aeroflow Performance is a collapsible spacer that installs on the pinion and preloads the pinion bearings. This crush sleeves is not reusable and must be replaced if the pinion nut is loosened or removed. Overall Diameter is 1.630" ( 41.40mm ). Inside Diameter is 1.350 ( 34.30mm ). Overall Thickness is 0.500" ( 12.70mm ).
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