Jeep Cherokee

 Service Manual

Differential and driveline » Tube, 181, and 186 FBI 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 gear nut and yoke.
•  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.

General information

Gear noise

Bearing noise

Vibration

Driveline snap