Shop now for Case Halves and Case Parts specific to 1981-1988 GM Trucks with New Process 208 Transfer Cases. Most items in stock for quick shipping.
In New Process NP208 Transfer Cases, the Drive Chain is only under power in 4x4 modes. For 4x2 operation, the input shaft is directly coupled to the rear output shaft. Contrary to popular belief, a worn or stretched NP208 chain can not cause a clunk in 4x2 mode, however a stretched chain CAN and will wear a hole in the soft aluminum transfer case if it sags enough to contact the housing. If you are rebuilding the NP208 transfer case in your vintage 4x4 REPLACE the chain!










































