Chrysler 1998 Viper RT/10 Owner's Manual page 152

3 - 32 DIFFERENTIAL AND DRIVELINE
S R
DIAGNOSIS AND TESTING ( C o n t i n u e d )
Drive Condition
Possible Caws© Correction
PROPELLER S H A F T
a. Undercoating or other foreign material
on shaft.
b. Loose U-joint clamp screws.
c. Loose or bent U-joint yoke or excessive
runout.
d. Incorrect drive line angularity.
e. Rear spring center bolt not in seat.
f. Worn U-joint bearings.
g. Propeller shaft damaged (bent tube} or
out of balance.
h. Broken rear spring.
i. Excessive runout or unbalanced
condition.
j. Excessive drive pinion gear shaft yoke
runout.
a . Clean exterior of shaft and wash with
solvent.
b. Tighten screws properly.
c. Install replacement yoke.
d. Correct angularity
e. Loosen spring U-bolts and seat center
bolts.
f. Replace U-joint.
g. Install replacement propeller shaft.
h. Replace rear spring.
i. Reindex propeller shaft W0°, test and
correct as necessary.
j. Reindex propeller shaft 180° and
evaluate.
UNlWItSAL JOIN? NOISE
a. U-joint clamp screws loose.
b. Lack of lubrication.
a . Tighten screws with specified torque.
b. Replace U-joint.
J9216-7
Driveline Vibration
PROPELLER SHAFT UNBALANCE
I f propeller shaft unbalance is suspected, i t can be
verified w i t h the following procedure.
N O T E : R e m o v i n g a n d r e - i n d e x i n g t h e p r o p e l le r
s h a f t 1 8 0 ° m a y eliminate s o m e v i b r a t i o n s .
Clean a l l the foreign material from the propeller
shaft and the universal joints (mud, undercoating,
etc.).
Inspect the propeller shaft for missing balance
weights, broken welds, and bent areas. I f the pro-
p e l l e r shaft i s found w i t h a n y of these condi-
tions, the shaft m u s t be r e p l a c e d .
Ensure the universal joints are not worn, are prop-
erly installed, and correctly aligned w i t h the shaft.
Check the universal j o i n t clamp screws torque.
Check universal j o i n t angles.
(1) Raise and support the vehicle.
(2) Remove the wheels/tires. I n s t a l l the wheel l u g
nuts to r e t a i n the brake discs.
(3) M a r k and number the propeller shaft tube
approximately six inches from the yoke weld end at
four positions 90° apart.
(4) R u n and accelerate the vehicle u n t i l vibration
occurs. Note the intensity and speed the vibration
occurred. Stop the engine.
(5) I n s t a l l a screw clamp at position 1 (Fig. 1).
(6) Start the engine and recheck for vibration. I f
there is l i t t l e or no change i n vibration, move the
clamp to one of the other three positions. Repeat the
vibration test.
SCREWDRIVER
RF487
Fig. 1 Clamp Screw At Position 1
(7) I f there is no change i n amount of vibration at
other positions, the vibration may not be caused by
prop shaft unbalance.
(8) I f the vibration decreased (but was not com-
pletely eliminated) install a second clamp (Fig. 2)
and repeat the vibration test.
(9) I f clamps cause an additional unbalanced con-
dition, separate clamp screws (1/4 inch above and
below the mark). Repeat the vibration test (Fig. 3).
(10) Increase distance between the clamp screws
and repeat the test u n t i l the amount of vibration is
at the lowest level. Bend the slack end of the clamps
so the screws w i l l not loosen.
(11) Install the wheel and tire. Remove supports
and lower the vehicle.