Chrysler 2005 Crossfire SRT6 Service Manual page 143

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CAUTION: Propeller shafts are balanced by the manufacturer. Before undercoating a vehicle, the propeller
shaft and universal joints should be covered. This will prevent the undercoating from causing an unbal-
anced condition and vibration.
CAUTION: Never allow the propeller shaft to drop or hang from the universal joint during removal. Suspend
the shaft to the vehicles underside with wire to prevent damage to the universal joints.
CAUTION: Protect the machined external surface of the slip yoke from damage after propeller shaft removal.
If damaged, the transmission extension seal could be damaged and cause a leak.
DIAGNOSIS AND TESTING - PROPELLER SHAFT
VIBRATION
Tires that are out-of-round, or wheels that are unbalanced, will cause a low frequency vibration.
Brake rotors that are unbalanced will cause a harsh, low frequency vibration.
Driveline vibration can also result from loose or damaged engine mounts.
Propeller shaft vibration increases as the vehicle speed is increased. A vibration that occurs within a specific speed
range is not usually caused by a propeller shaft being unbalanced. Defective universal joints, or an incorrect pro-
peller shaft angle, are usually the cause of such a vibration.
DRIVELINE VIBRATION
CONDITION
PROPELLER SHAFT NOISE
UNIVERSAL JOINT NOISE
BALANCE
If propeller shaft is suspected of being unbalanced, it can be verified with the following procedure:
1. Raise and support the vehicle.
2. Clean all the foreign material from the propeller shaft and the universal joints.
Note: If the propeller shaft is bent, it must be replaced.
3. Inspect the propeller shaft for missing balance weights, broken welds, and bent areas.
4. Inspect the universal joints to ensure that they are not worn, are properly installed, and are correctly aligned with
the shaft.
5. Check the universal joint clamp bolts for proper torque.
6. Check the propeller shaft to transmission and differential flange retaining bolts for proper torque.
7. Remove the wheels and tires. Install the wheel mounting bolts to retain the brake rotors.
POSSIBLE CAUSES
1. Undercoating or other foreign
material on shaft.
2. Loose or bent U-joint yoke or
excessive runout.
3. Incorrect driveline angularity.
4. Worn U-joint bearings.
5. Propeller shaft damaged or out
of balance.
6. Excessive runout or unbalanced
condition.
7. Excessive axle yoke deflection.
1. Lack of lubrication.
PROPELLER SHAFT 3 - 27
CORRECTION
1. Clean exterior of shaft and wash
with solvent.
2. Install new yoke.
3. Measure and correct driveline
angles.
4. Install new U-joint.
5. Install new propeller shaft.
6. Re-index propeller shaft, test, and
evaluate.
7. Inspect and replace yoke if
necessary.
1. Replace U-joints as necessary.