Dodge ZB 2005 Service Manual page 108

ZB
PROPELLER SHAFT (Continued)
(8) If the vibration decreased (but was not com-
pletely eliminated) install a second clamp (Fig. 2)
and repeat the vibration test.
Fig. 2 TWO CLAMPS AT POSITION 1
(9) If clamps cause an additional unbalanced con-
dition, separate clamp screws (1/4 inch above and
below the mark). Repeat the vibration test (Fig. 3).
Fig. 3 CLAMPS SEPARATED
1 - 1 ⁄ INCH
2
(10) Increase distance between the clamp screws
and repeat the test until the amount of vibration is
at the lowest level. Bend the slack end of the clamps
so the screws will not loosen.
(11) Install the wheel and tire. Remove supports
and lower the vehicle.
(12) If the amount of vibration remains unaccept-
able, apply procedures at the front end of the propel-
ler shaft.
(13) If the vibration has been eliminated with the
use of clamps, the shaft is out of balance. The shaft
should be replaced. Use this procedure only to deter-
mine shaft balance. Do not leave clamps on shaft as
a permanent repair.
PROPELLER SHAFT RUNOUT
(1) Remove dirt, rust, paint, and undercoating
from the propeller shaft surface. Areas where the dial
indicator will contact the shaft must be clean.
(2) The dial indicator must be installed perpendic-
ular to the shaft surface.
(3) Measure run-out at the center and ends.
(4) Refer to Runout Specifications chart.
(5) Replace the propeller shaft if the run-out
exceeds the limit.
Propeller Shaft Runout Specifications
Front of Shaft
Center of Shaft
Rear of Shaft
NOTE: Measure front/rear runout approximately 3
inches (76 mm) from the weld seam at each end of
the shaft tube for tube lengths over 30 inches. Under
30 inches the max. runout is 0.20 inch for the full
length of the tube.
PROPELLER SHAFT ANGLE
When two shafts intersect at any common univer-
sal joint, the bend that is formed is called the work-
ing angle. The larger the working angle, the larger
the amount of acceleration and deceleration of the
joint. For every revolution there are two accelera-
tions and deceleration of the universal joint. This
speeding up and slowing down of the joint must be
cancelled to produce a smooth power flow. This is
done through phasing and proper universal joint
working angles.
NOTE: Before measuring universal joint angles, the
following must done.
• Check the condition of all suspension springs
and verify all fasteners are torqued to specifications.
• Check the condition of the engine and transmis-
sion mounts and verify all fasteners are torqued to
specifications.
• The vehicle should have a full tank of fuel and
no cargo in the vehicle.
• Remove any retainer clips (if equipped) from
universal joint so protractor base sits flat on bearing
cap.
The universal joint angle is not adjustable. If the
angle is found to be incorrect, check the following
items:
• Engine and transmission mounts for sagging or
improper installation.
• Pinion crossmember mounts for looseness or
improper installation.
• Broken pinion crossmember
PROPELLER SHAFT 3 - 3
0.010 in. (0.25 mm)
0.015 in. (0.38 mm)
0.010 in. (0.25 mm)