Transfer Case Mode Fork, 261/263 HD/XHD, 2001-2007 GM 6.6L Duramax LB7 LLY LBZ

401850 Transfer Case Mode Fork, 261XHD / 263XHD.
For 2001, 2002, 2003, 2004, 2005, 2006, 2007 GM 6.6L Duramax LB7 LLY LBZ

Replace if the plastic wear pads show signs of damage. A worn fork can cause the transfer case to not stay in gear.