SUBJECT:

WHEEL ALIGNMENT REQUIREMENTS AND BEST PRACTICES

Slip Plates - The slip plates of a Hunter alignment
rack are designed to move smoothly and freely to
provide accurate measurements.
Before pulling a vehicle onto the rack, check that
the slip plates move freely and do not bind.
Periodically clean the area underneath the slip
plates by blowing compressed air through the
area to remove any debris. If this action does not
free a binding slip plate, contact your local Hunter
representative for cleaning and lubrication
recommendations.
Hunter StraightTrak LFM
StraightTrak is a required feature for Hunter’s
GSP9700 wheel balancer. This feature measures
tire lateral force caused by ply steer, conicity, and
other issues which may contribute to vehicle drift
or pull.
Use the StraightTrak feature to address tire
induced vehicle pull.
StraightTrak will arrange the four wheel/tire
assemblies of a vehicle in a configuration which
will result in the lowest drifting or pulling force.

NOTES
•

•

•

Some vehicles have staggered size
tires (front vs. rear), and have limited
tire configuration options.
Different software versions may have
different screens than what is shown
in this TSB. Contact your Hunter
representative for detailed
information on proper StraightTrak
operation.
When deciding on a configuration for
least drift/pull, some thoughtful
consideration is required.
Depending on the severity of the
drift/pull, a configuration that results
in the best tracking performance may
differ from the Hunter StraightTrak
recommendations.

TSB #: 20-SS-001H

Page 9 of 11
SUBJECT:

SUBJECT:

WHEEL ALIGNMENT REQUIREMENTS AND BEST PRACTICES

Use StraightTrak to arrange the four wheel/tire
assemblies in a configuration which will result in
the lowest drifting or pulling force by performing
the following actions:
1. Remove all wheel/tire assemblies from the
vehicle.
2. Balance the front left assembly on the
Hunter GSP9700 with StraightTrak feature.
An icon located in the lower right corner will
display whether or not StraightTrak is
enabled.

3. After balancing, press the tire tag button
located at the bottom right of the screen to
assign a number to that assembly. Label
the assembly accordingly with a tag or
chalk mark.
4. Continue to balance and tag all four
assemblies. After all assemblies are
completed, the screen will show display
positioning and the effect on vehicle
drift/pull or vibration. The purple horizontal
arrow at the top of the screen displays
overall pulling force and direction due to
tire effects. The brown vertical arrows
above each tire displays the RFV (road
force variation) of each assembly.
•

Select “Show Least Pull” for lowest tire
effects on pulling.

•

Select “Show Least Vibration” for the
smoothest ride.

TSB #: 20-SS-001H

Page 10 of 11
SUBJECT:

SUBJECT:

•

WHEEL ALIGNMENT REQUIREMENTS AND BEST PRACTICES

Select “Show Alternate Placements”
for other configurations.

NOTES
•

•

•

Some vehicles have staggered size
tires (front vs. rear), and have
limited tire configuration options.
Different software versions may
have different screens than what is
shown in this TSB. Contact your
Hunter representative for detailed
information on proper StraightTrak
operation.
When deciding on a configuration
for least drift/pull, some thoughtful
consideration is required.
Depending on the severity of the
drift/pull, a configuration that
results in the best tracking
performance may differ from the
Hunter StraightTrak
recommendations.

TSB #: 20-SS-001H

Page 11 of 11
SUBJECT:

Vehicle Alignment Diagnostic Flowchart
Road Test Case #1 – 3.3 ft
•
Use minimal throttle
input and do not vary
throttle input during

•

testing

•

PASS Criteria: More than 6 seconds 40MPH

•

Repair Procedure Notes
The Vehicle Alignment Diagnostic Flowchart must
be followed for all alignment/drift/pull/off-center
repairs.
The Vehicle Alignment Data Sheet is REQUIRED to
be filled out completely and stored with the RO.
Perform all road testing using Road Test Case #1
criteria, at 40 MPH with no passengers or excessive
cargo in the vehicle.
Following an alignment, ASP must be performed on
vehicles equpped with electric power steering

1. Record condition
description and vehicle data

2. Record received tire
pressure. Set to placard tire
pressure (cold tires)

Service Complete

No drift/pull:
Steering Wheel
Centered

3. Perform
road test.

Explain tire pressure effect on vehicle
pull to customer

Steering Wheel
Off-Center

Perform alignment

Drift/pull

4. Use the Hunter GSP 9700
to measure lateral force on
all 4 tires. Then arrange tires
for improved drift/pull
performance.

Service Complete

No drift/pull

Notes:
- Some vehicles are equipped with
staggered tires, limiting tire
arrangement configurations.
- Lateral force is NOT the same as
radial force variation (RFV).

5. Perform
road test.

Drift/pull

6. Align Vehicle. Reset ASP
calibration if applicable.

Service Complete

No drift/pull

7. Perform
road test.

Drift/pull

Contact Hyundai
Assistance Hotline
1-800-325-6604

Note: Alignment angles should be set
to the center of the specification.

Vehicle Alignment Data Sheet

•

•

Repair Procedure Notes
The Vehicle Alignment Diagnostic Flowchart must be followed for all alignment/drift/pull/off-center repairs.
o Refer to the Vehicle Diagnostic Flowchart for detailed information on how to correctly complete this
form.
The Vehicle Alignment Data Sheet is REQUIRED to be filled out completely and stored with the RO.

VIN:
Model/Year:

Dealer:

Repair Date:

Mileage:
Tire Wear/Vehicle Condition
Comments:

Customer Comments:

1. Condition

Received Tire Pressure: (PSI)
2. Tire Pressure

LF
LR

3. Road Test

4. Front

Tire

Lateral
Force
(StraightTrak)

5. Road Test

6. Vehicle

Alignment

7. Road Test

RF
R
R
vehicle

Direction
drifts/pulls:
(Circle)
How many seconds the vehicle
takes to drift/pull from one side of
lane to other:
Input Initial and Final Initial
Front Lateral Force:
lbs:
Front
Lateral
Force
Initial:
Direction: (Circle)
Direction
vehicle
drifts/pulls:
(Circle)
How many seconds the vehicle
takes to drift/pull from one side of
lane to other:

Tire Pressure Set To: (PSI)
LF

RF
R
R

LR
LEFT

RIGHT
Fail 1-6 seconds
Pass 6-10 seconds
Final
lbs:

LEFT / RIGHT

LEFT

Final:

LEFT / RIGHT

RIGHT
Fail 1-6 seconds
Pass 6-10 seconds

Attach both before and after Alignment Print-Outs to the back of this form
and keep with the RO.
Direction
vehicle
drifts/pulls:
(Circle)
How many seconds the vehicle
takes to drift/pull from one side of
lane to other:

LEFT

RIGHT
Fail 1-6 seconds
Pass 6-10 seconds

Final
Comments:

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