Meritor MM-96147 Maintenance Manual page 87

6. Repeat Step 5 for the carrier universal joint.
7. Using a carpenter's square, measure the distance from the
transmission universal joint point to the frame rail reference
line. Figure 14.32.
Fig. 14.32
8. Repeat Step 7 for the carrier universal joint.
9. The universal joint plan view angle (true joint angles) can now
be calculated by using Formula 1.
Calculate Driveline Angles
1. Measure and record the side view angles. Refer to the
procedure in this section. Figure 14.33 is shown as a
reference.
TRANSMISSION
ANGLE
3.0
-1.0
JOINT 1 ANGLE
Fig. 14.33
2. Calculate the plan view universal joint angles using Formula 1.
Figure 14.34.
Distance
–1
Plan_Angle= Tan (
Formula 1
Fig. 14.34
(16579)
Printed in USA
4005554a
DRIVELINE
RIGHT AXLE
ANGLE ANGLE
2.0 1.0
-1.0
JOINT 2 ANGLE
4005571a
–Distance
Trans
Driveline_Length
4005555a
14 Measuring and Recording Driveline Angles
TRANSMISSION
JOINT OFFSET
(CENTER TO
FRAME RAIL)
(DISTANCE TRANS)
Fig. 14.35
NOTE: Both joints will have the same plan view angle. Figure 14.35
is shown as a reference.
3. Calculate the compound universal joint angles using
Formula 2. Figure 14.36.
Compound_Angle =
Fig. 14.36
The compound universal joint angles (true universal joint operating
angles) should not be greater than 5 degrees during vehicle
operation, and the difference between the carrier-driveline joint
angle and transmission-driveline joint angle should not be greater
than 1.5 degrees to ensure optimal operation of the drivetrain.
Axle
)
Copyright Meritor, Inc., 2021
DRIVELINE LENGTH
(CENTER TO
CENTER)
FRAME RAIL
AXLE JOINT
OFFSET
(CENTER TO
FRAME RAIL)
(DISTANCE AXLE)
4005572b
2
Side_Angle + Plan_Angle
from Step 1 from Step 2
4005555c
Formula 2
MM-96147 / Revised 03-21
2
Page 87