Abstract: A transfer case includes an input shaft and first and second output shafts. An overdrive unit is driven at an increased speed relative to the input shaft. A clutch is operable in a first position to establish a drive connection between the input shaft and the first output shaft. The clutch is further operable in a second position to establish a drive connection between the overdrive unit and the first output shaft. An actuator is driven by a motor for moving the clutch between its first and second positions. The actuator includes an axially movable fixed disk fixed for rotation with an output member of the overdrive unit. The shift engages an axially movable sleeve of the clutch.

Abstract: A transfer case includes an input shaft and first and second output shafts. An overdrive unit is driven at an increased speed relative to the input shaft. A clutch is operable in a first position to establish a drive connection between the input shaft and the first output shaft. The clutch is further operable in a second position to establish a drive connection between the overdrive unit and the first output shaft. An actuator is driven by a motor for moving the clutch between its first and second positions. The actuator includes an axially movable fixed disk fixed for rotation with an output member of the overdrive unit. The shift engages an axially movable sleeve of the clutch.

Abstract: An integrated cam and shift fork assembly is disposed on a rotating shift rail. The shift fork assembly includes a cylindrical body having a helical cam at one end. Adjacent the cam end of the body is a cam follower secured to the rotating shift rail. The opposite end of the body either includes a second cam and suitably disposed cam follower or a flat surface engaged by a return spring. The rotating shift rail is driven by an electric motor through a suitable speed reducing and torque increasing drive such as a worm gear set. One or both of the aforementioned cam configurations may be utilized in a transfer case on a single shift rail to, for example, select a high or low speed range, couple the primary and secondary drive lines together or both.