Shop now for Drive Chains for 1980-1986 Ford F250 and F350 4x4 trucks with New Process NP208 Part Time Transfer Cases.
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!








