Dodge RAM TRUCK 1500 1995 Service Manual page 1233

3 - 4 DIFFERENTIAL AND DRIVELINE — — — ^ —^ B R
D I A G N O S I S A N D T E S T I N G (Continued)
Fig. 5 Clamp Screw At Position 1
RF488
Fig. 6 Two Clamp Screws At The Same Position
(9) I f the clamps cause an additional unbalance,
separate the clamps (1/4 inch above and below the
mark). Repeat the vibration test (Fig. 7).
1
Fig. 7 Clamp Screws Separated
(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 tires. Lower the vehicle.
(12) I f the amount of vibration remains unaccept­
able, apply procedures at the front end of the propel­
ler 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 runout at the center and ends away
from welds.
(4) Refer to Runout Specifications chart.
(5) Replace the propeller shaft i f the runout
exceeds the limit.
RUNOUT SPECIFICATIONS
S E R V I C E P R O C E D U R E S
UNIVERSAL JOINT ANGLE
INFORMATION
When two shafts come together at any common
joint, the bend that is formed is called the operating
angle. The larger the angle, the larger the amount of
acceleration and deceleration of the joint. This speed­
ing up and slowing down of the joint must be can­
celled to produce a smooth power flow. This is done
through phasing and proper universal joint working
angles.
A propeller shaft is properly phased when the yoke
ends are on the same plane or in line. A twisted shaft
will throw the yokes out of phase and cause a notice­
able vibration.
When taking universal joint angle measurements
or checking phasing with two piece shafts, consider
each shaft separately. On 4WD vehicles, the front
shaft input (pinion shaft) angle has priority over the
caster angle.
Ideally the driveline system should have;
Front of shaft 0.010 in. (0.25 mm)
Center of shaft . . .". . . . . . . 0.015 in. (0.38 mm)
Rear of shaft . . . . . . , , 0.010 in. (0.25 mm)
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 full length of the tube.
J9116-15