What is a counter balance on a chevy malibu inside the tranfer case

An internal combustion engine has a crankshaft, a clutch, and a transmission including a main shaft rotatable by the crankshaft through the clutch and a countershaft rotatable by the main shaft through gears. A counterbalance mechanism includes at least a primary counterweight rotatable in synchronism with the crankshaft, and a hollow shaft rotatably supported concentrically on the main shaft, the primary counterweight being integrally mounted on the hollow shaft, the clutch being corotatably mounted on the hollow shaft and operatively coupled to the crankshaft at the same speed as and in the opposite direction to the crankshaft.