The Yukon 0.875in notched cross pin shaft is produced for 8.8-inch Ford differentials for 1986 and newer applications, with the notched profile matching later Ford carriers. Yukon notes this shaft is not compatible with Powertrax Lock Rights or Spartan Lockers. It’s intended as a correct-dimension replacement for Ford 8.8in carriers requiring a .875in notched shaft.
Yukon Gear 8.8in Ford 7/8in Diameter Notched Cross Pin Shaft (.875in For 86+)