DEFINITION: The roughness or vibration occurs while driving the vehicle at various speeds.

The propeller shaft is bent or dented.

Replace the propeller shaft. Refer to Front Propeller Shaft Replacement or Rear Propeller Shaft Replacement .

Undercoating is on the propeller shaft.

Clean the propeller shaft.

The tires are unbalanced at 48-80 km/h (30-50 mph).

Balance or replace the tires.

The universal joints are tight.

On snap ring retainer U-joints, tap the yokes with a hammer in order to free up the U-joints. If you are unable to free up the U-joints, or if the joint feels rough, replace the joint.

The universal joints are worn.

Replace the worn universal joints.

The companion flange is bent or has excessive runout.

Refer to Vibration Diagnosis in General Information.

Burrs or gouges are on the companion flange.

The propeller shaft, parking brake drum, or the companion flange is unbalanced.

The rear joint angle is incorrect, usually as result of the angle being too large.

The slip spline is excessively loose.

Replace the necessary parts.

The yokes or flanges are distorted or damaged.

Install new yokes or flanges.

The driveline vibration occurs at 80 km/h (50 mph).

Inspect the propeller shaft for runout and for missing balance weights. Refer to Vibration Diagnosis.

The propeller shaft and axle flange paint marks are misaligned by more than 90 degrees.

Align the paint marks as close as possible.