DEFINITION: A ping, snap or click is usually heard on initial load after the transmission is in gear, either forward or reverse.

There is a loose fixed yoke or companion flange.

Tighten the bolts and the pinion nut to specified torque refer to Fastener Tightening Specifications .

There are worn or damaged universal joints.

Replace the universal joints. Refer to Universal Joint Replacement - Nylon Injected Ring or Universal Joint Replacement - External Snap Ring .