On Bench
- Bench check is performed with transfer case disassembled. Install clutch gear on side gear. Install assembled clutch gear and side gear on viscous coupling. Place viscous coupling assembly in a soft-jawed vise. Firmly clamp assembly on side gear.
- Ensure clutch gear fully engages in coupling. Install rear output shaft. Install rear yoke retaining nut. Using a torque wrench, measure turning torque. If turning torque is less than 25 ft. lbs. (34 N.m), replace coupling.