Step Action
DIAGNOSTIC:

Check suspension ride height by measuring on the same axle and side as the
leveling valve is located.

6

• Conduct this check with no trailer. Suspension must not be loaded.
• Ensure there is over 100 psi of air in the tanks
• Ease the truck into the bay and apply wheel chocks. Do not set the
parking brake and do not come to an abrupt stop.
• Fully deflate the suspension than re‐inflate.
• Verify pressure is still above 100 psi.
• Measure from the top of the axle to the bottom of the frame rail. This
measurement should be 6 1/2" (+ or ‐ 1/8")

Decision
Yes. Go to Step 14

No. Adjust ride height per Technician
Manual.
Retest to see if vibration is still present.
Record the road test with the Smartphone
vibration App.
If vibration is still present, review the
phone data. Go to Step 8 if the phone
data indicates a driveline vibration
If vibration is resolved and return unit to
customer.

Is ride height adjusted properly?

Step Action
7.

DIAGNOSTIC:
Yes. Go to Step 8
Disconnect the long shaft at the rear differential. Rotate shaft assembly 180 degrees
at the differential yoke. Re-install and road test. Is the vibration still objectionable? No. End diagnostics and return to service.

Step Action
7.

Decision

DIAGNOSTIC:
Yes. Go to Step 8
Disconnect the long shaft at the rear differential. Rotate shaft assembly 180 degrees
No. End diagnostics and return to service.
at the differential yoke. Re-install and road test. Is the vibration still objectionable?

Step Action
8

Decision

DIAGNOSTIC:

• Open LT driveline service worksheet.
• Email or fax this 2 page document to your local driveline shop and
confirm that they can perform this repair.

Decision
Vibration is still present.
Take another recording with the
Smartphone or tablet and review results
Proceed to the driveline resource center
document in the Other Resources
section of this article.

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IK1700017 ­ LT & LoneStar vibration at highway speeds

• If you cannot locate a shop that can perform this repair then order new
drivelines. A parts Case File may be needed
• Send BOTH driveshafts out for repairs with the worksheet
• When re‐installing the shafts make sure the index paint markings from
the driveshaft shop are aligned
• After the shafts are installed, road test and confirm the vibration is no
longer present

Step Action
DIAGNOSTIC:

Page 5 of 8

If Tech Services requests driveline runout
measurements use THIS SHEET

Vibration is gone
Return truck to service.

Decision
Yes. Go to Step 11

Check pressures on all tires. Are both steer tires and all drive tires within 5 psi
No. Correct the air pressure and test
of each other?
10
drive. If vibration concern is not
resolved, go to Step 11. If resolved, end
procedure and return unit to customer.

Step Action
DIAGNOSTIC:

Check the tightness of the torque arm fasteners, See Figure 3. It may be
11 located behind the cab. Are the fasteners tight?

Decision
Yes. Go to Step 12
No. Torque fasteners. Test drive to see if
complaint is resolved. If resolved, End
Procedure and return unit to customer. If
not, go to Step 12

Figure 3: Torque Arm Fastener
Item 1: Torque Rod Bolt
Item 2: Torque Rod Nut
Item 3: Torque Rod

A loose torque rod or cross member can transmit a vibration produced from the driveline or tires and
exaggerate the feel in the cab. Always make sure all joints with bolts on the truck are tight and torqued to
spec.

Step Action

Decision

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IK1700017 ­ LT & LoneStar vibration at highway speeds

DIAGNOSTIC:

Inspect each tire for flat spotting caused by a brake lock‐up event. Are flat
12 spots present?

Step Action
DIAGNOSTIC:

Page 6 of 8

Yes. Go to Step 14
No. Go to Step 13

Decision
Yes. Go to Step 14

Check suspension ride height by measuring on the same axle and side as the
leveling valve is located.

13

• Conduct this check with no trailer. Suspension must not be loaded.
• Ensure there is over 100 psi of air in the tanks
• Ease the truck into the bay and apply wheel chocks. Do not set the
parking brake and do not come to an abrupt stop.
• Fully deflate the suspension than re‐inflate.
• Verify pressure is still above 100 psi.
• Measure from the top of the axle to the bottom of the frame rail. This
measurement should be 6 1/2" (+ or ‐ 1/8")

No. Adjust ride height per Technician
Manual. Retest to see if vibration is still
present. If still present, go to Step 14. If
vibration conern is resolved, end
Procedure and return unit to customer.

Is ride height adjusted properly?

Prior to performing any type of balance procedure on the vehicle always refer to the lineset ticket and verify how the
truck was ordered.

0029TAK ‐ Yellow dot aligned to valve stem
0029TAG ‐ Unidirectional tires
0029TAD ‐ Do Not Balance (contact your CSE for direction on repair)

Step Action
14 DIAGNOSTIC:

Use Hunter Engineering locator tool http://www.hunter.com/heavy‐
duty/forcematch‐hd/search to see if a ForceMatch HD wheel balancer is in
your immediate area. Is this wheel balancer nearby?

Decision
Yes. Have all wheels rebalanced and
check radial runout on Hunter ForceMatch
HD Machine. Rotate tire on the rim to
achieve .040" or less runout on all
wheels. Ask tire shop to provide the
before and after runout value for each tire.
Enter the information in a Case File if one
is open.

Note: For run­out problems, the matchmounting procedure is often an effective
method to eliminate the concern. Matchmounting isolates the tire, wheel, and bolt
circle of the wheel to determine where the problem may be. It can also determine if a PRINT Tire Shop Worksheet
combination of variables is responsible because the tolerances “stack” to create an Mark the peak point of runout on each tire
so it can be properly oriented when
unacceptable condition. .
installed on the truck
Road Force Balance Highlights
Go to Step 15

No. At a commercial tire shop, have all
wheels rebalanced and check radial
runout with a dial indicator on the balance
machine. Dismount tire as needed and
rotate on the rim to reduce runout as
needed.
Match Mounting Instructions
PRINT Tire Shop Worksheet

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IK1700017 ­ LT & LoneStar vibration at highway speeds

Page 7 of 8

Mark the peak point of runout on each tire
so it can be properly oriented when
installed on the truck
Go to Step 15

Step Action

Decision

DIAGNOSTIC:

Reinstall front tires with the point of peak runout at the top (12 o'clock). Install Yes.
the front tire with the least runout on the driver's side. Do not use any
Take another vibration recording with the
Smartphone or tablet and review results
centering devices.
to determine the source

15 Reinstall rear tires with the points of peak runout 180 degrees from each
other, see Figure 4.

Retest. Is Vibration still present?
No. Procedure complete.

Figure 4 - Example of match mounting
Identify the high spots of both tires on the dual and make sure those high
spots are 180 degrees from each other when installing on the truck.

WARRANTY INFORMATION
Warranty Claim Coding:
Refer to the Warranty Coding Manual for Group and Noun Codes.

Standard Repair Time(s):
Refer to the SRT Manual for Repair Times
TBD

OTHER RESOURCES
IK0600020 Determine Wheel Speed or Driveline Vibration using a Smart Phone and Free VibSensor Application
IK1400005 Driveline Information Center and Troubleshooting Procedures
IK0500038 Steering Shake, Shimmy, Shudder, or Steering Vibration
IK0400102 ProStar-Vibration While Braking

Go back!

GoodYear Tire training videos related to wheel induced vibrations

Goodyear Tire Website

Michelin Tire Manual

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IK1700017 ­ LT & LoneStar vibration at highway speeds

Goodyear tire manual

Page 8 of 8

Road Force Balance Tire Manual Click Here
Hunter Engineering MatchForce HD tire balance machine video

• Understanding Vehicle Vibrations

◦
Locate a MatchForce HD tire machine near your dealer
http://www.hunter.com/heavy-duty/forcematch-hd/search

• Controlling Vehicle Vibrations
◦

• Minimize Vehicle Vibrations
◦
• Reduce tire runout using Match Mounting
◦

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