411070A Transfer Case Input Seal, 261XHD / 263XHD.
For 2001, 2002, 2003, 2004, 2005, 2006, 2007 GM 6.6L Duramax LB7 LLY LBZ
The input seal must be removed for full transfer case tear down to access the planetary snap ring. A new seal must be installed during reassembly.