Dodge RAM TRUCK 1500 1995 Service Manual page 1235

3 - i DIFFERENTIAL AND DRIVELINE
B R
S E R V I C E P R O C E D U R E S ( C o n t i n u e d )
SPECIAL
TOOL
7663
(J-23498A)
PINION YOKE
BEARING CAP
J9216-12
Fig. 11 Rear (input) Angle Measurement (B)
(6) Subtract smaller figure from larger (C minus
B) to obtain axle Input Operating Angle.
Refer to rules given below and the example in (Fig.
12) for additional information.
• Good cancellation of U-joint operating angles
(within 1°)
• Operating angles less than 3°
© At least 1/2 of one degree continuous operating
(propeller shaft) angle
MEASUREMENT—TWO-PIECE SHAFT
A rear propeller shaft U-joint angle can be easily
measured with Special Tool 7663.
The front half-shaft must be parallel to the rear
axle pinion gear shaft. The front and rear half-shafts
must be offset by a minimum of 1/2 of .a degree. From
the transmission/transfer case output shaft and from
each other.
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.
(2) Place Inclinometer on yoke bearing (A) parallel
to the shaft (Fig. 13). Center bubble i n sight glass
and record measurement.
(3) Repeat measurement procedure on bearing cap
B and C. Record these measurements.
(4) Excessive variation in measurement angles of
A, B or C indicate propeller mis-alignment. Vertical
alignment of a two-piece shaft at the yokes
should be greater t h a n one-half degree and as
close to one degree as possible.
O u t p u t
Yoke
Horizontal Level
(A) Output Yoke = 3.0° 4 . 9 °
(C) Prop. Shaft = 4 . 9 ° ° r - 3 . 0 °
Transmission Output
Operating Angle
1 9 °
(B) Axle Input Yoke
(C) Prop. Shaft
3.2° 4 . 9 °
or
4.9° -3.2°
Axle Input
Operating Angle
1.7°
Trans. Output Operating Angle 1.9°
Axle Input Operating Angle -1.7°
Amount of U-J6int Cancellation 0.2°
J9316-3
Fig. 12 Universal Joint Angle Example