For 1990-2009 cars

Cause | Correction
--- | ---
Definition: A ping, snap, or click is usually heard on initial load after the transmission is in gear, either forward or reverse.
Upper and lower control arms have loose bushing bolts. | Tighten the bolts to specified torque.
A loose fixed yoke or companion flange | Tighten bolts and pinion nut to specified torque.
Worn or damaged universal joint | Replace the propeller shaft assembly because universal joint is not serviceable.
The driveline vibration is at 80 km/h (50 mph) | Inspect the propeller shaft for runout.