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Document ID: IK1700018

Major System:

WHEELS

Created:

14
7/18/2019

Current Language: English

Last Modified: 9/26/2024

Other Languages: NONE

Author:

Viewed:

Mark Ehlers

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Title : CV Vibration - wheels
Applies To : CV

CHANGE LOG
Please refer to the change log text box below for recent changes to this article:
09/18/2024 - Updated load range G tires
10/14/2020 - Updated parts lists for drive tires from "HDR" to "HDR+"
08/21/2020 - Updated hyperlink for hunter machine locator.
01/13/2020 - Updated service parts information for steer tire
10/02/2019 - Updated service parts information to Contiental tires
08/20/2019 - Author updated for feedback purposes
08/12/2019 - Initial Article Release

DESCRIPTION
This article applies to CV vehicles that experience an objectionable wheel end vibration felt in the cab at highway speeds.
Possible Causes:
Loose engine or transmission mounts- Added April 2024
Abnormal tire wear
Excessive tire pressure
Excess tire runout
Excess wheel runout
Excess hub runout
Excess tire radial force variation (RFV) also referred to as RoadForce link
Worn or damaged wheel hub bearing
Improper wheel bearing adjustment

SYMPTOM(s)
Customer Observations or Concerns:
Wheel end vibration frequencies do not follow engine rpm but rather vehicle speed. Driveline vibrations also follow vehicle speed and should not
be confused with wheel-end vibration.
Wheel-end vibrations will have a lower frequency than driveline vibrations. The driveline rotates at higher speed than the wheels: Wheel speed x
differential gear ratio = driveline speed. Wheel-end vibrations will cause a lower frequency (shake or hop), and driveline vibrations will create a
higher frequency (buzz or whine).
Wheel end vibrations often occur within a specific vehicle speed range. When tire/wheel frequency aligns with the suspension's natural
frequency, resonance occurs increasing the driver's perception of excessive vibrations. Due to the suspension's natural frequency a wheel end
vibration can disappear when vehicle speed is increased or decreased beyond a specific resonance speed range.
Some wheel-end vibrations will phase in and out at the same vehicle speed, which is caused by multiple wheel-end vibrations. When in phase
the vibration from one wheel will come in phase with the vibration from another wheel and cancel out the vibration. When not in phase the
vibration from one wheel will combine with another wheel, creating a high amplitude vibration.

SPECIAL TOOL(s) / SOFTWARE
Use PicoScope NVH to measure the frequency of the vibration to determine if it is wheel end frequency. (Pico Resource Center) Record audio
of the test drive also- Follow IK2900085

SERVICE PARTS INFORMATION
Primary path: Correct the issue using the original tires and contact your local tire representative for assistance in repairing/replacing any tires
deemed to be faulty.

Optional path: Replace with tires shown below if the issue with the original tire cannot be corrected. The replacement tire's load range (H or
G) must match the tires the vehicle was built with.
The Continental tire's RED dot must be mounted on the lowest point of runout on the wheel. The tire shop must mount the bare rim onto the
balancer and MEASURE THE RIM RADIAL RUNOUT to ID the lowest spot of the rim.

Kit Description

Part Number

Quantity
Required

Notes

225/70R19.5
CONTINENTAL HSR5 & HDR5
Load Range G

N/A

tbd

Install only if the issue with the original tire
cannot be corrected. RECORD THE
NEW TIRE serial number BEFORE the
tire is mounted. Do this for each tire.

225/70R19.5
CONTINENTAL HSR+ and HDR+
Load Range H

N/A

tbd

Install only if the issue with the original tire
cannot be corrected. RECORD THE NEW
TIRE serial number BEFORE the tire is
mounted. Do this for each tire.

Continental tire serial number decal shown below (located on the bead of the tire)

DIAGNOSTIC and REPAIR STEP(s)
Step Action
DIAGNOSTIC:

Decision
Yes: Proceed to Step 2.

Determine if the vehicle has an objectionable wheel end vibration

1

No: end

Step Action

Decision

DIAGNOSTIC & REPAIR:

Yes: Clean up, repair, or replace worn,
damaged, or out-of-specification
Determine if tire and wheel assemblies have damage, excessive mud, snowpack, or components. Adjust tire pressure per
debris affecting wheel balance, improper tire wear, improper tire seating, or runout
weight/inflation chart. After repairs are
with a visual inspection.
complete, retest for symptoms.
Do the wheels have add-on tire pressure equipment or "simulator" wheel covers
(see below)? If so remove and retest for symptoms.

2

Do the wheels have separator discs that have been reused? See below. If so
remove and retest for symptoms.
Per TMC RP222 separator discs are one one-time use.

No: Proceed to step 3

Step Action
3

DIAGNOSTIC & REPAIR:

Decision
Yes: Proceed with Step 4

Has the vibration existed since the truck was new?

No: Check prior repair history that could
affect wheel end and inspect
for service issues - Retest for symptoms.
If no issues are found and the unit still has
the same vibration, proceed with Step 4.

Step Action
DIAGNOSTIC & REPAIR:

Decision
Yes: Go to Step 5

Use the Hunter Engineering locator tool to see if a ForceMatch HD wheel balancer is
in your immediate area. Link
PRINT Tire Shop Worksheet. Mark the peak point of runout (.040" max) on each tire
so it can be properly oriented when installed on the truck

4

If a Hunter ForceMatch HD balancer is not in the immediate area, 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.
If the tire is a Continental and the factory red dot on the sidewall is still visible then No: Release unit.
position the red dot on the spot on the rim with the lowest radial runout.
Match Mounting Instructions
Goodyear tires- Mark the peak point of runout on each tire so it can be properly
oriented when installed on the truck.
Install the tires with the least runout on the steer axle. See step 8.
Retest for symptom. Does the unit still exhibit the same vibration?

Step Action
DIAGNOSTIC & REPAIR:

Decision
Yes: Go to step 6

Determine if the tire is properly seated to the wheel
Measure the distance between the tire guide rib and wheel edge in 4 locations 90
degrees apart.
On steer tires, measure both the front and back of the tire.
On dual tires, do not measure guide ribs located between dual wheels.
Are measurements on each side within 1/16” (1.59 mm) of each other?

No: Inspect the tire and replace if
damaged. If the tire is not damaged, have
a trained / qualified tire technician
dismount the tire, lube bead, and remount
the tire to the wheel. After repairs are
complete, remeasure runout and retest for
symptom

5

Step Action
6

DIAGNOSTIC & REPAIR:
Determine if the wheel is properly mounted to the hub.

Decision
Yes: Go to step 7

1. Determine if the wheel is flush against the hub mating surface.
2. Inspect hub pilot pads for damage such as bending or gouging.
3. Check lug nuts torque. See the appropriate Operation and Maintenance
Manual for lug nut torque information.
Are the wheels properly mounted?
No: Remove the wheel from the hub.
Remove corrosion/debris from between
the hub and wheel. Properly mount the
wheel to the hub. After repairs are
complete, retest for symptoms.

Step Action
DIAGNOSTIC & REPAIR:
Determine if tire tread depth has excessive variation. Measure tire tread depth in 4
locations 90 degrees apart. Measure at center of tread. Is tread depth variation 3/32
inch or more?

7

Yes: Replace affected tires. After repairs
are complete, retest for symptoms.

No: Go to Step 8.

Step Action
8

Decision

DIAGNOSTIC & REPAIR:
Determine if the front axle hub pilot pad-to-wheel clearance is contributing to a radial
runout.
1. Using a feeler gauge, measure clearance between hub pilot pads and wheel.
2. Determine the location of the greatest hub wheel clearance.
3. Center the wheel on the hub. Move the wheel and snug the lugs so that you
measure the same hub-to-rim gap at every pad location.
4. Torque all lugs and remeasure gaps. Reposition the wheel if needed.

Decision
Yes: end

Road test. Has the symptom been corrected?

No: Go to Step 9.

Step Action

Decision

DIAGNOSTIC & REPAIR:
Open a case file and thoroughly explain what has been done to the vehicle. Include
details of the tire make, model and condition.
NOTE- IF the CV is a 4x2 and was built before 12/13/21 and there is more than
.006" clearance between the hub and the rim then a front hub upgrade will better
center the rim on the hub.

9

CNM10019962 ABS TONE RING
CNM10082920 ASSEMBLY HUB ROTR AFTRMRKT
CNM10084194 GREASE SEAL SERVICE KIT- FC FRONT

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

OTHER RESOURCES
Master Service Information Site
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