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WHEELS/SUSPENSION—VIBRATION AT HIGHWAY Article No.
SPEEDS—SERVICE TIPS 04-3-3
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VIBRATION—VIBRATION AT HIGHWAY SPEEDS—
SERVICE TIPS
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TRANSMISSION/DRIVESHAFT/AXLE—VIBRATION AT
HIGHWAY SPEEDS—SERVICE TIPS
FORD:
2004 F-150
SERVICE PROCEDURE (Refer To Figure 1)
ISSUE
Some 2004 F-150 vehicles may exhibit a vibration
FIRST ORDER TIRE/WHEEL DIAGNOSTIC
at highway speeds. The vibrations will typically be
PROCEDURE 10-12 HZ, 88-105 KM/H (55-65
felt through the seat and/or floorpan.
MPH)
ACTION
NOTE
The purpose of this TSB is to simplify the process
FOR 4X2 VEHICLES GO DIRECTLY TO STEP 2.
for diagnosing vehicle vibration and avoid
1. Check the integrated wheel end (IWE) on 4X4 unnecessary repairs. Refer to (Figure 1) and select
units. Raise the front of the vehicle (wheels off the symptom and speed that matches the customer
the ground), engine running, vehicle in 2WD description of the condition and perform only those
mode. The front half shafts should not turn diagnostics steps.
when wheels are rotated by hand. If the IWE is
NOTE
functioning correctly proceed to Step 2. If not,
BEFORE BEGINNING THIS PROCEDURE,
refer to the Workshop Manual Section 308-07
ENSURE THAT THE TIRES DO NOT HAVE FLAT
to repair IWE first. Then proceed to Step 2.
SPOTS. IT MAY BE NECESSARY TO DRIVE THE
2. If road force measurement equipment (Hunter
VEHICLE FOR UP TO 30 MILES TO ELIMINATE
GSP9700/9712, or equivalent) is available,
THIS CONDITION. IF THE VEHICLE’S CONDITION
proceed to Step 3. If not, mark the original
IS CORRECTED AFTER DRIVING, THEN RETURN
tire/wheel location on each tire. (i.e. LF, LR,
THE VEHICLE TO THE CUSTOMER. NO
RF, RR) and remove from the vehicle. Check
FURTHER DIAGNOSTICS ARE REQUIRED.
wheel balance, and rebalance as required to
NOTE
achieve less than 0.25 oz. (7g) of imbalance.
WHEN EVALUATING THE CONDITION IT IS
Reinstall wheels and road test vehicle. If the
RECOMMENDED THAT THE VEHICLE BE
condition is corrected return the vehicle to the
OPERATED ON A FLAT SMOOTH-SURFACED
customer. If not, proceed to Step 5.
ROAD THAT HAS MINIMAL OR PREFERABLY
3. If road force measurement equipment is
NO EXPANSION JOINTS, SUCH AS ASPHALT.
available (Hunter GSP9700/9712, or equivalent),
ROUGH ROAD SURFACES MAY MASK THE
measure the tire road force variation on all four
CONDITION OR GIVE A FALSE FEELING OF
(4) tires, following the manufacturer’s
VIBRATION.
instructions and
TSB 03-20-8. If any wheel
assembly measures more than the values listed
below for R1H or R2H then proceed to Step 4.
If not proceed to Step 5.
NOTE:
The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and equipment to do
the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information that could assist in proper
vehicle service. The procedures should not be performed by "do-it-yourselfers". Do not assume that a condition described affects your car or truck. Contact a
Ford, Lincoln, or Mercury dealership to determine whether the Bulletin applies to your vehicle. Warranty Policy and Extended Service Plan documentation
determine Warranty and/or Extended Service Plan coverage unless stated otherwise in the TSB article.The information in this Technical Service Bulletin
(TSB) was current at the time of printing. Ford Motor Company reserves the right to supercede this information with updates.The most recent information is
available through Ford Motor Company’s on-line technical resources.
Copyright
ã 2004 Ford Motor Company PAGE 1
Article No. 04-3-3 Cont’d.
Tire Types:
b. If the vibration is eliminated, the source of
vibration is either transmission or rear axle • P Metric Tires, (R1H 26 lbs.) (R2H 18 lbs.)
related. Proceed to Step 3.
• LT Tires, (R1H 39 lbs.) (R2H 27 lbs.)
NOTE
4. Using the tire road force measurement
IF POSSIBLE, PERFORM STEPS 3 & 4 WHILE
machine, determine the low spot of the wheel
GOING UP A SLIGHT GRADE TO INCREASE
run out. Match high point force variation on the
LOAD ON ENGINE.
tire with the low spot of wheel run out. Re-test
the wheel assembly force variation. If the wheel 3. Achieve peak vehicle vibration and set vehicle
assembly is now acceptable, rebalance and Speed Control.
road test vehicle. If the condition is corrected
4. Unlock transmission torque converter by hitting return the vehicle to the customer. If not,
overdrive cancel button. replace the tire and re-check, then rebalance
and road test vehicle. If the condition is
a. If vibration remains with transmission torque corrected return the vehicle to the customer. If
converter unlocked, source of vibration is not, proceed to Step 5.
most likely the rear axle. Replace rear axle
and re-evaluate. 5. Condition is due to vehicle sensitivity. Obtain
Damper Kit 4L3Z-5D008-AA and refer to the
b. If the vibration is eliminated, the source of instruction sheet included in the kit for
the vibration is most likely transmission installation.
related. Refer to the Workshop Manual
Section 307-01, Diagnosis By Symptom,
NOTE
Other Concerns: Noise/Vibration in Forward
THE DAMPER KIT WILL NOT HELP STEERING
or Reverse for continued diagnosis. Repair
WHEEL NIBBLE CONDITIONS.
as required and re-evaluate.