Dodge Durango
Service Manual
Differential and Driveline » 8 1/4 And 9 1/4 axle » Diagnosis and testing
Driveline snap

A snap or clunk noise when the vehicle is shifted into gear (or the clutch engaged), can be caused by:

High engine idle speed.
Transmission shift operation.
Loose engine/transmission/transfer case mounts.
Worn U-joints.
Loose spring mounts.
Loose pinion nut and companion flange.
Excessive ring gear backlash.
Excessive side gear to case clearance.

The source of a snap or a clunk noise can be determined with the assistance of a helper. Raise the vehicle on a hoist with the wheels free to rotate. Instruct the helper to shift the transmission into gear. Listen for the noise, a mechanics stethoscope is helpful in isolating the source of a noise.

More about «Diagnosis and testing»: