The NP205 transfer case has a reputation for being as tough as a rock. It came in GM, Ford, Dodge, and International trucks as far back as 1969, and it was produced in GM trucks until the mid '80s when the NP208 finally replaced it in all applications except for cab and chassis trucks, which kept the 205 until '91. The venerable 205 was made in lefthand drops for Ford and righthand drops for the rest, as well as remote and married versions, and late-GM applications even had a slip-yoke rear housing. Different input and output shafts were used through the years, but the core case design and center cluster gear remained the same on all units. Identifying an NP205 is relatively easy: It has a cast-iron case and center idler shaft with a nut on the front and a three-bolt cover on the rear, is about 12 inches long, has a center rear output, and usually has an ID tag above the front output shaft.