Dodge RAM TRUCK 1500 1995 Service Manual page 1234

B R DIFFERENTIAL AND DRIVELINE 3 - 5
SERVICE PROCEDURES
( C o n t i n u e d )
• Angles that are in equal or opposite within 1
degree of each other
• Have a 3 degree maximum operating angle
• Have at least a 1/2 degree continuous operating
(propeller shaft) angle
Engine speed (rpm) is the main factor though in
determining maximum allowable operating angles.
As a guide to maximum normal operating angles
refer to the chart listed (Fig. 8).
PROPELLER SHAFT M A X « NORMAL
R.P.M. OPERATING ANGLES
5000
3°
4500
3°
4000
4 °
3500 5°
3000 5°
2500 7°
2000 8°
1500 11°
J9316-4
Fig. 8 Maximum Angles And Engine Speed
INSPECTION
Before measuring universal joint angles, the
following must be done.
• Inflate all tires to correct pressure
• Check angles in the same loaded or unloaded
condition as when the vibration occurred. Propeller
shaft angles will change according to the amount of
load in the vehicle. Always check angles in loaded
and unloaded conditions.
• * Check the condition of all suspension compo­
nents and verify all fasteners are torqued to specifi­
cations.
• Check the condition of the engine and transmis­
sion mounts and verify all fasteners are torqued to
specifications.
PROPELLER SHAFT ANGLE MEASUREMENT
To accurately check driveline alignment, raise and
support the vehicle at the axles as level as possible.
Allow the wheels and propeller shaft to turn. Remove
any external bearing snap rings (if equipped) from
universal joint so protractor base sits flat.
(1) Rotate the shaft until transmission/transfer
case output yoke bearing is facing downward.
Always make measurements from front to
rear.
(2) Place Inclinometer on yoke bearing (A) parallel
to the shaft (Fig. 9). Center bubble in sight glass and
record measurement.
This measurement will give you the transmis­
sion or Output Yoke Angle (A).
(3) Rotate propeller shaft 90 degrees and place
Inclinometer on yoke bearing parallel to the shaft
(Fig. 10). Center bubble in sight glass and record
(J-23498A) J9216-13
Fig. 9 Front (Output) Angle Measurement (A)
measurement. This measurement can also be taken
at the rear end of the shaft.
This measurement will give you the Propeller
Shaft Angle (C).
J9216-9
Fig. 10 Propeller Shaft Angle Measurement (C)
(4) Subtract smaller figure from larger (C minus
A) to obtain Transmission Output Operating Angle.
(5) Rotate propeller shaft 90 degrees and place
Inclinometer on pinion yoke bearing parallel to the
shaft (Fig. 11). Center bubble in sight glass and
record measurement.
This measurement will give you the pinion
shaft or Input Yoke Angle (B).