Spicer Vibration Diagnostics - Manual

Perform visual inspection
and use Eaton Driveline
Angle Analyzer (DAA).
Look for loose:
U-joint bearing cups and
trunnions
Bearing straps
Flange yoke / companion flange
Yoke-mounted damper
Parking brake
Center bearing
Fasteners
Driveshaft for damage / missing
weights
Driveshaft slip spline
(wear / bottoming /
inadequate engagement)
Cab mounts / air ride system
Check for other
possible causes
Check:
Clutch
Center bearing
Transmission rear
supports
Engine mounts
Perform visual inspection
and use Eaton Driveline
Angle Analyzer
(DAA).
Look for loose:
Torque arms
Driveshaft slip spline (wear/
bottoming/ inadequate
engagement)
U-joint
Bearing straps
Flange yoke/ companion
flange
Center bearing
Fasteners
Cab mounts/ air ride system
Have vehicle driver recreate
complaint condition, if
possible
Leave trailer attached
Run up to suspected RPM and
put transmission in neutral
Road Test
When did vibration start?
Where is vibration felt?
What road conditions?
Under load or high torque
conditions?
During acceleration/deceleration?
Speed dependent?
RPM dependent?
Noise?
Suspension modified
recently?
Lube clean and at proper level?
Gather Info
Simulate Conditions
Speed
RPM
Gear Position
Coast
Under power
Loaded / Unloaded
Record Findings
Speed
RPM
Gear position
Coast
Under power
Loaded / Unloaded
Stationary Inspection
Tires
Rims
Dented driveshaft tubing
Engine supports
Transmission supports
Driveshaft center bearing
Vibrations
While
Stationary
Previous
work on clutch or
engine
If clutch work recently done,
problem could be related to
the clutch. Verify proper
clutch was installed.
Speed
Related?
Contact your
engine distributor.
If engine work recently done,
problem could be related to
the engine. Contact your
engine distributor.
Does ride
height meet
OEM specs
Was
suspect shaft
isolated?
Problem is
related to
driveshaft.
Replace
driveshaft.
If Dana product,
return failed
component to
Dana Driveshaft.
Correct per OEM
procedures.
Problem
Solved
Done!
Remove all
drive axle shafts
and lock in
power divider.
Run truck in
same condition
as when
complaint
occurred.
Problem
Solved
Problem is related to
the wheel end. Take
known good wheel
assembly and test
replacement from
wheel to wheel to
isolate problem.
Isolate Suspect
Shaft
Check:
Driveshaft runout
Re-index driveshaft -
Separate shaft at end
yoke, rotate 180
o ,
and reassemble.
If problem persists,
contact Roadranger
Support Team:
1-800-826-4357.
Problem
Occur with
Trailer
Loaded?
Does ride
height meet
OEM specs
Correct per OEM
procedures.
Remove inter-axle
shaft and lock power
divider.
Run truck in same
condition as when
complaint occurred.
Problem
Solved
Problem is related to
the inter-axle shaft.
Contact Roadranger
Support Team:
1-800-826-4357.
Problem
Solved
Done!
If problem
persists,
contact
Roadranger
Support Team:
1-800-826-435
7.
Start
Problem
Solved
Done!
1
2
3
4
5
6
Starting with
rear-most vehicle
driveshaft, remove
each section and
re-run test to
isolate suspect
shaft.
In the road test
in Step 2, the
vehicle was run
up to the
suspected RPM
and the
transmission
shift lever was
placed in
neutral.
Did the vibration
occur during this
test?
Problem is related
to the clutch.
Remove clutch and
check for: Broken
springs, disc, or
other damage.
Important: Use factory service manuals and procedures and refer to all applicable safety precautions when servicing vehicles This document is intended to assist with drivetrain vibration diagnosis.
It does not guarantee an immediate solution nor does it guarantee warranty responsibility or reimbursement. Refer to dana.com for Product Warranty Statements, Warranty Manual, and Warranty Guidelines.
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1-800-826-4357
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Vibration Diagnostics
Dana Commercial Vehicle Products Group - 3939 Technology Drive - Maumee, Ohio, USA 43537
www.dana.com
Printed in USA RRMT-0001 01/08