VIBRATION

Vibration usually occurs at specific speeds with the vehicle under full power coasting conditions.

1. Excessively worn slip yoke and/or splines.
2. Excessively worn U-joints, CV joint or CV centering kit.
3. Driveshaft is not straight or out of balance.
4. Driveshaft tubing is dented.
5. Driveshaft angles are too large or incorrect due to vehicle modifications.
6. Driveshaft is too short or too long due to improper driveshaft or vehicle modifications.
7. Worn attaching yokes at differential, transfer care or transmission.
8. Slip yoke and spline not moving freely

SQUEAKING OR CLUNKING

When shifting transmission into drive or reverse, or when shifting transfer case or transmission into 4WD.

1. U-joints or CV centering kit are worn out and/or are out of grease.

2. U-joints have become corroded with rust.

3. Attaching yokes are distorted, preventing the U-joint to seat properly.

4. U-joint straps or U-bolts have been over torqued, pinching U-joint bearings.

PREMATURE U-JOINT FAILURE

1. Lack of/or improper grease procedures.
2. Excessive driveshaft angle.
3. Frozen slip yoke and spline.
4. Attaching yokes distorted.
5. Over torqued U-joint straps or U-bolts.

BROKEN/TWISTED DRIVESHAFT OR BROKEN COMPONENTS

1. Result of frozen slip yoke and spline.
2. Excessive overloading of vehicle.
3. Excessive driveshaft angles.
4. Driveshaft too long or too short.
5. Excessive torque due to vehicle modifications.
6. Excessive torque due to improper use of the vehicle.