This is a transfer case gasket and seal kit for the Dodge, Jeep, GM and Chevy New Process 231 transfer case for years 1987-94 This transfer case gasket and seal kit is for an aluminum transfer case and is for the chain driven transfer case only. This transfer case uses a wide input bearing BD50-8 (.94"). This will work for all NP231 transfer cases from 1987-94 with the wide input bearing. This kit includes all the transfer case gaskets, seals, and o-rings.