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1. Prod D Tracks Left ate Alignment Readings degrees 5 1 1 Loosen struts push pull 1 Replace struts 5 31 knuckle retighten 2 Align and set ASP 2 Align and set ASP 6 1 1 Install camber bolts 1 Install camber bolts 7 31 2 Align and set ASP 2 Align and set ASP Use Op Code OK 10CA21R3 OR 10CA21R5 Road Test No Passengers Vehicle Does Not Track Straight Contact Hyundai Technical Assistance Hotline at 1 800 325 6604 with this Data Sheet completed Final Repair Comments Service Manager print name Date Road Test Case 1 3 3 ft Repair Procedure Notes All campaign vehicles must be road tested and the results recorded on this data sheet Perform all road testing using Road Test Case 1 criteria at 40 MPH For vehicles with camber bolts adjust cross camber according to road test results see page 16 of the TSB Keep individual camber within mcm NS 0 5 0 5 THIS COMPLETED DATA SHEET IS REQUIRED TO BE SUBMITTED BY FAX 714 965 5097 OR EMAIL HMAcampaign hmausa com TSB 11 01 030 Page 4 of 21 Signature Use minimal throttle input and do not vary throttle input during testing SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL SUBJECT VEHICLES ONLY SERVICE CAMPAIGN 928 YF Sonata 2 4 and 2 0T Alignment Specifications 16 and 17 Wheels Item Front Rear 0 52. 0 5 1 0 0 5 0 0 0 5 4 44 0 5 ooo Toe Total 0 16 0 2 0 17 0 2 Toe Individual 0 08 0 1 0 085 0 1 Factors that Influence Vehicle Tracking Vehicle drift or pull can be attributed to several factors Understanding what can affect it is imperative for anyone repairing a vehicle with a tracking condition Air pressure Low front tire pressure can cause a vehicle to track towards that tire Alignment e Camber A vehicle will track towards the side with more positive front camber e Caster A vehicle will tend to track towards the side with less positive caster e Steering Axis Inclination SAI The angle formed by the line drawn through the steering pivot axis and a line at true vertical when viewed from the front of the vehicle SAI is designed into a vehicle s suspension and aids straight line stability This angle can be measured by the alignment machine For Hunter units it is measured during the caster sweep process It is useful for checking for damaged components when the SAI difference between left and right sides is more than 1 degree If SAI is lower on one side of the vehicle it may indicate a bent lower control arm If SAI is higher on one side of the vehicle it may indicate damage to the upper strut mount Thrust angle This is the direction the rear axle is pointing as a result of the rear toe angles and results in the steering wheel being off center To avoid this si
3. ene Select System Selected System TEE ENGINE _ A T _ESC__ AIRBAG AIR CON EPS o EEn eS BCM IMMO PIC TPMS CODE c Select Option Treatment on the initial screen after entering the vehicle information d Select ASP Calibration TSB 11 01 030 Page 17 of 21 l SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 SUBJECT WHEEL VEHICLES ONLY SERVICE CAMPAIGN 928 CD Preparation Diagnosis Vehicle JW Managerwn Repair O SONATA Fw201 WwG27460 EPS Type Recognition ASP Calibration Data Treatmern nspection Test f o Cove Anasi DTC Current Dats Sar e Read the prompt screen and select OK when ready T ASP Calibration ASP Calibration This function is used for initiating ASP Calibration Perform this function when you replace EPS ECU or do work related to EPS if you re ready press OK button Cancel f Ensure the ignition and engine are ON and that the steering wheel is centered with the front wheels pointed straight ahead TSB 11 01 030 Page 18 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL SUBJECT VEHICLES ONLY SERVICE CAMPAIGN 928 ASP Calibration ASP Calibration This function is used for initiating ASP Calibration Perform this function when you replace EPS ECU or do work related to EPS 2nd Stage 1 ignition On 2 Engine On Turn the steering wheel to
4. Case 1 3 3 ft Repair Procedure Notes All campaign vehicles must be road tested and Use minimal throttle input the results recorded on this data sheet and do not vary throttle Perform all road testing using Road Test Case 1 input during testing criteria at 40 MPH For vehicles with camber bolts adjust cross camber according to road test results see page s of the TSB Keep individual camber within Page 3 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 SUBJECT WHEEL VEHICLES ONLY SERVICE CAMPAIGN 928 YF Vehicle Tracking Data Sheet Fara VW E NEW THINKING ae 2 S NEw POSSIBILITIES a h FD AYUNDAL fi 3288s Record customer Boater is omments and vehicle Tire Ereesune l lta iaa Technician Prodate S G Explain tire pressure impact Customer Comments on vehicle pull to customer Road Test No Passengers OK Vehicle Tracks Tracks Straight Left or Right Stg Wheel Off Center Tire Wear Vehicle Condition Comments 1 Align Vehicle amp set ASP Aligner Make Model Calibration Date B Initial Test Drive Use Hunter GSP9700 StraightTrak Era PASS NO PASS LEFT RIGHT feature to measure and arrange all Toe Adjust wheel tire assemblies for least lateral force configuration Calibration Date Tire Lateral Force from Straight Trak R Before Ibs L R After Ibs L R oad Test No Passengers PASS NO PASS LEFT RIGHT
5. straight ahead position and press OK button Press CANCEL button to exit Cancel g Select OK h Turn the ignition OFF wait 15 seconds then turn the ignition ON again Check in current data that the steering angle sensor is within 5 degrees S Message initializing completed After ignition key off wait for 15 sec before next ignition key on and press OK button Check the steering angle sensor is within 5 at data analysis TSB 11 01 030 Page 19 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL VEHICLES ONLY SERVICE CAMPAIGN 928 SERVICE CAMPAIGN NOTIFICATION Dear 2011 or 2012 Sonata Owner A small number of owners of 2011 and 2012 Sonata vehicles equipped with factory installed 16 inch or 17 inch wheels and tires may have experienced dissatisfaction with vehicle tracking Hyundai has issued a service campaign to correct this condition on those vehicles that may be affected This letter provides you with information about the service campaign What is the purpose of the service campaign e Some 2011 and 2012 Sonata vehicles equipped with factory installed 16 inch or 17 inch wheels and tires may not track as the driver desires without slight minor steering wheel correction when driving on straight flat roads Hyundai has developed a service procedure to improve the tracking of vehicles affected by this condition What vehicles does this apply to e This service
6. 1 11 which track left Warranty Information Model Op Code Operation 10CA21R1 Road Test and Correct Off Center Steering Wheel 10CA21R0 Road Test Only 10CA21R3 StraightTrak Adjust Camber Alignment 3 Road Tests left tracking vehicles 10CA21R4 StraightTrak Install Struts Alignment 3 Road Tests right tracking vehicles 10CA21R5 StraightTrak Install Camber Bolts Alignment 3 Road Tests NOTE Submit claim on Campaign Claim Entry Screen 7 YF YF YF StraightTrak 2 Road Tests YF YF TSB 11 01 030 Page 2 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL VEHICLES ONLY SERVICE CAMPAIGN 928 SUBJECT Service Procedure NOTES e Perform road tests using CASE 1 criteria at 40 MPH only Camber adjustments are based on case 1 tracking results See page 16 for details Strut replacements should only be made for right tracking vehicles produced from 5 1 11 through 5 31 11 Camber bolts installation should only be made for vehicles produced from 6 1 11 through 7 31 11 When a vehicle is received with a tracking condition the service writer should document the customer comments using the Vehicle Tracking Data Sheet Many issues may affect vehicle tracking such as tire pressure tire uniformity wheel alignment brake drag road crown cross winds spring sag resulting in ride height differences cargo load weight distribution and more lt is important to c
7. 12 Remove the coil spring L TSB 11 01 030 Page 12 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL SUBJECT VEHICLES ONLY SERVICE CAMPAIGN 928 13 Assemble the strut assemblies by reinstalling all removed parts in reverse order of removal Do not reuse original strut mounting nuts knuckle strut tower and strut top Use the new ones provided Tightening torque for strut top Make sure the notch on the strut nut 58 8 68 6 Nm rod matches up with the notch 6 7 kgf m 43 4 50 6 lb ft in the spring upper seat during re installation TSB 11 01 030 Page 13 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL VEHICLES ONLY SERVICE CAMPAIGN 928 Camber Adjustment for left tracking vehicles produced from 5 1 11 through 5 31 11 1 Lift the vehicle on a hoist and remove both wheel assemblies 2 Starting on the LEFT side loosen both strut to knuckle mounting nuts 3 Leave the two strut to knuckle bolts loose For left tracking vehicles N On the LEFT strut apply and hold pressure to the m For LEFT Strut top of the brake rotor towards the center of the d push towards vehicle then tighten all strut fasteners d a center of car Tightening torque 157 176 N m 16 0 18 0 kgf m 116 130 lb ft TSB 11 01 030 Page 14 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL SUBJECT VEHICLES
8. BJECT VEHICLES ONLY SERVICE CAMPAIGN 928 o If you already have a log on and password for online scheduling enter them here click on Log In then click on Repair Select Campaign and in the Repair Service box enter the code SONATA TR0O2 and click on OK Follow the instructions on the next screens to schedule your appointment o If you do not have a log on and password complete the information under New Customer and click on Repair Select Campaign and in the Repair Service box enter the code SONATA TR0O2 and click on OK Follow the instructions on the next screens to schedule your appointment lf your preferred dealer does not have a link to schedule service online please contact them via phone to schedule an appointment What if you have other questions e lf you have any questions related to this service campaign please contact the Hyundai Customer Connect Center at 1 800 633 5151 or ConsumerAffairs hmausa com We thank you for your purchase of your Sonata and hope for your continued satisfaction as a Hyundai owner Hyundai Motor America TSB 11 01 030 Page 21 of 21
9. ONLY SERVICE CAMPAIGN 928 4 Repeat steps 2 3 for the RIGHT strut with the following exception For RIGHT Apply and hold pressure in the opposite direction pull the top of brake rotor towards outside of vehicle then tighten all strut fasteners Strut pull towards outside of car Tightening torque 157 176 N m 16 0 18 0 kgf m 116 130 lb ft Camber Adjustment Service Camber Bolt for vehicles produced from 6 1 11 through 7 31 11 1 Lift the vehicle on a hoist and remove wheel assembly 2 Remove upper strut to knuckle mounting nut and bolt TSB 11 01 030 Page 15 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL VEHICLES ONLY SERVICE CAMPAIGN 928 3 Install a service camber bolt in the upper strut to knuckle hole Ensure the washer tab is facing the correct direction according to the desired camber adjustment range For more positive camber adjustment install the bolt with the washer tab facing towards the wheel Install the camber bolt with the washer tab facing the engine inside for more negative camber adjustment right strut For more negative camber adjustment install the bolt with the washer tab facing towards the engine Install the camber bolt with the washer tab facing the wheel outside for more positive camber adjustment 4 With both the upper camber bolt and lower factory bolt strut to knuckle bolts slightly loo
10. a GROUP NUMBER LP HYLI nN D H f W Di 7 IBIN TH z CAMPAIGN 11 01 030 DATE MODEL S Technical Service Bulletin SEPTEMBER 2011 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL VEHICLES ONLY SERVICE CAMPAIGN 928 IMPORTANT Dealer Stock and Retail Vehicles Dealers must perform this Service Campaign on all affected vehicles prior to customer retail delivery and whenever an affected vehicle is in the shop for any maintenance or repair When a vehicle arrives at the service department access Hyundai Motor America s Warranty Vehicle Information screen via WEBDCS to identify open Campaigns Description The following procedure describes how to diagnose and repair certain Sonata YF vehicles that may not track as desired e The Vehicle Tracking Data Sheet on page 4 of this TSB is REQUIRED to be completed then either faxed to 714 965 5097 or emailed to HMAcampaiqn hmausa com e Perform road tests using CASE 1 criteria at 40 MPH only Camber adjustments are based on case 1 tracking results e Dealers and Sublet Vendors must adhere to the vehicle tracking diagnosis and repair flowchart provided on the Vehicle Tracking Data Sheet e Test drives should be completed with no passengers or excessive cargo in the vehicle e To perform proper vehicle tracking diagnosis access to a Hunter GSP 9700 equipped with StraightTrak is necessary If you do not have access to such equipment it may be lo
11. campaign applies only to 2011 and 2012 model year Sonatas equipped with factory installed 16 inch and 17 inch wheels and tires that were manufactured beginning on May 1 2011 through July 31 2011 and that do not track straight without steering wheel correction on straight flat roads If your vehicle tracks straight you do not need to have this service campaign performed What will Hyundai do e lf your vehicle does not track as you desire on straight flat roads your Hyundai dealer will check your vehicle s wheel alignment and how your vehicle tracks If necessary your Hyundai dealer will install new front Suspension struts and or camber bolts update the Electronic Power Steering software and perform a wheel alignment procedure at no charge to you What should you do e Please schedule an appointment at your convenience to take your vehicle to your Hyundai dealer When you make an appointment please confirm the dealer s schedule to determine how much time will be required to perform the work so you may plan appropriately It may be necessary to leave your vehicle at the dealer overnight To help facilitate the process you can schedule an online appointment Please visit Hyundai com click on Find a Dealer and input your zip code When your preferred dealer appears click on Schedule Service under their address TSB 11 01 030 Page 20 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL SU
12. cated through the Hunter website www gsp9700 com e For additional information please refer to the latest alianment TSB www hmaservice com Applicable Vehicles 2 4L and 2 0T does not include HEV e Sonatas YF produced from 5 1 11 through 7 31 11 16 and 17 Tire Equipped Vehicles Only Circulate To General Manager Service Manager Parts Manager Warranty Manager Service Advisors Technicians Body Shop Manager Fleet Repair SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL VEHICLES ONLY SERVICE CAMPAIGN 928 Parts Information REMARKS PART NUMBER D ae WAN ie QTY Front Strut LH Assembly For 2 4L GLS and 4691 8Q000QQh Strut Knuckle Mounting Nuts Limited vehicles For right tracking vehicles produced Strut Tower Mounting Nuts T u W untl u equipped with 16 from 5 1 11 through 5 31 11 9 and 17 wheels Left strut kit Strut Top Mount Self Locking i and which track Nut aa right order these two strut kits Front Strut RH Assembly 54661 3Q000QQh Strut Knuckle Mounting Nuts Use new nuts when installing new For right tracking vehicles produced Strut Tower Mounting Nuts from 5 1 11 through 5 31 11 Struts as provided Right strut kit Strut Top Mount Self Locking Nut 54699 3Q000QQH 2 camber bolts per kit For vehicles produced from 6 1 11 through 7 31 11 Camber Bolt Kit 16mm Do not install the above listed parts on vehicles produced from 5 1 11 through 5 3
13. de Inspect the brake system to ensure brake drag is kept to a minimum on all four wheels Cross Winds Cross winds can push a vehicle towards one side of the road It is important to conduct road testing by driving a vehicle in opposite directions to verify the effects of cross winds Proper Alignment Rack Usage and Maintenance These tips apply to Hunter Engineering alignment racks and wheel balancers that feature StraightTrak It is imperative that the following items be followed to ensure accurate alignment readings Aligner Calibration Maintenance Schedule It is required that all dealer alignment racks be calibrated by a representative every 6 months This allows the representative to update vehicle specs and inspect and maintain equipment Rolling Compensation The rolling compensation procedure Is critical to ensuring an accurate alignment When performing the rolling compensation be sure to do the following e Set tire pressure to factory specification e Verify that the vehicle is not excessively loaded Remove any heavy items e Ensure the lift is level so vehicle s suspension and steering are in a neutral position e Set the target levels before rolling compensation After completing the compensation do not re level the targets e Roll the vehicle by turning the left rear tire This will not disturb the vehicle s suspension and steering systems Do not roll the vehicle by pushing or pulling on body parts bumpers e
14. m the vehicle Balance the front left assembly on the Hunter GSP9700 with StraightTrak feature An icon located in the lower right corner will show whether or not StraightTrak is enabled 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 Continue to balance and tag all four assemblies After all are completed the screen will show tire positioning and the effect on tire pull or vibration The purple horizontal arrow at the top of the screen shows overall pulling force and direction due to tires The brown vertical arrows above each tire show the RFV of each assembly Select Show Least Pull for lowest tire effects on pulling Select Show Least Vibration for the smoothest ride TSB 11 01 030 Balance inch P Tires Er gt Straight Trak LEM Assembly Placement Least Tire Pull 7Iks Alternate ie war i r bdi Page 8 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL SUBJECT VEHICLES ONLY SERVICE CAMPAIGN 928 Select Show Alternate Placements _ Assembly Placement Net Tire Pull for other configurations TSB 11 01 030 Page 9 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL VEHICLES ONLY SERVICE CAMPAIGN 928 Strut Removal and Alignment Procedu
15. onsider all potential effects when diagnosing and confirming a vehicle tracking condition Refer to TSB 11 SS 001 1 for standards on how to evaluate vehicle tracking perform StraightTrak tire rotation as well as general information regarding contributing factors YF Vehicle Tracking Data Sheet Fae NEN W W THII KING Campaign O36 GP HYUNDAI al comments and vehicle a a The YF Vehicle Tracking Data Sheet on the following page must cat be faxed or emailed to the following Fax 714 965 5097 OR Email HMAcampaign hmausa com Ensure all fields are completed including Case 1 lane change times for each test drive All Data sheets are subject to warranty review TSB 11 01 030 Oma Tecan Pred eto Explain tire pressure impact Customer Comments Road Test on vehicle pull to customer K Vehicle Tracks eerie 1 Align Vehicle amp set ASP Left or Right g Aligner Make Model Off Center Calibration Date Use Hunter GSP9700 StraightTrak 2 Wheel feature to measure and arrange all Toe Adjust wheel tire assemblies for least lateral force configuration Calibration Date Tire Wear Vehicle Condition Comments Initial Test Drive Road Test No Passengers Use Op Code 10CA21R3 OF 10CA21R5 Vehicle Does Not Track Straight Contact Hy Technical Assistance Hotline at 1 800 325 6604 with this Data Sheet completed Final Repair Comments Service Manager print name Signature Date Road Test
16. re for right tracking vehicles produced from 5 1 11 through 5 31 11 1 Remove the left front tire amp wheel assembly Tightening Torque 89 107 Nm 9 0 11 0 kgf m 66 79 lb ft 2 Remove the stabilizer link upper mounting nut A Tightening Torque 99 117 Nm 10 0 12 0 kgf m 73 86 lb ft 3 Remove the speed sensor and brake hose brackets P B 4 Remove the strut knuckle mounting bolt and nut C Tightening torque 157 176 N m 16 0 18 0 kgf m 116 130 lb ft TSB 11 01 030 Page 10 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL SUBJECT VEHICLES ONLY SERVICE CAMPAIGN 928 5 Loosen the left front strut upper mounting nuts and remove the strut amp spring assembly Tightening torque 45 58 N m 4 5 6 0 kgf m 33 43 lb ft 6 Set the removed strut amp spring assembly into the SST 09546 26000 as shown on the photo 7 Press down the coil spring D SN CAUTION Only compress the spring enough to confirm the bottom coil is no longer in contact with the spring seat TSB 11 01 030 Page 11 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL VEHICLES ONLY SERVICE CAMPAIGN 928 8 Loosen the self locking nuts E 9 Remove the insulator assembly F and the strut bearing G 10 Remove the spring upper seat H and pad l 11 Remove the dust cover J and the bumper rubber K
17. se turn the camber bolts to adjust the camber to the desired value Adjust the cross camber by the amount shown below for the tracking result range listed 1 40 mph camber minus right camber IMPORTANT The suggested cross camber adjustment values listed in the table are based on the results of Case 1 40 MPH road testing The values listed in the table are for cross camber change not absolute cross camber The cross camber value is to be achieved by adjusting the left and right camber values staying within the individual camber specification tolerance range 0 5 0 59 For vehicles which track right adjust the cross camber value more positive For vehicles which track left adjust the cross camber value more negative some vehicles may need additional adjustment beyond the suggested range to pass the road test Tighten both nuts top and bottom when the desired camber is achieved Tightening torque 157 176 N m 16 0 18 0 kgf m 116 130 lb ft TSB 11 01 030 Page 16 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL SUBJECT VEHICLES ONLY SERVICE CAMPAIGN 928 ASP Calibration Procedure Using the GDS a Choose VIN on the initial screen b Enter the vehicle information by pressing the VIN Auto Detect button entering the vehicle s VIN or selecting the vehicle model model year engine fuel tyoe and EPS as the system and then click OK GDS VIN Search snama A
18. tc TSB 11 01 030 Page 6 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL SUBJECT VEHICLES ONLY SERVICE CAMPAIGN 928 e Ensure the pins are in the slip plates and the turnplate bridge is flush with the rolling Ves See surface to minimize the vehicle s suspension movement Slip Plate Pins Slip Plates The slip plates of a Hunter alignment rack are designed to move smoothly and freely to provide accurate measurements Before driving a vehicle onto the rack check that they move freely and do not bind Periodically clean the area underneath the slip plates by blowing compressed air through to remove any debris If this does not free a binding plate contact your local Hunter representative for cleaning and lubrication recommendations StraightTrak LFM feature StraightTrak is an optional feature for Hunter s GSP9700 wheel balancer This feature measures lateral force of a tire due to ply steer conicity and other issues which may contribute to vehicle tracking This isa very useful tool for vehicles with a tracking condition TSB 11 01 030 Page 7 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL VEHICLES ONLY SERVICE CAMPAIGN 928 Use StraightTrak to arrange the 4 wheel tire assemblies of a vehicle in a configuration which will result in the least tire pull force by doing the following 1 2 Remove all wheel tire assemblies fro
19. tuation rear camber and toe should be adjusted before the front when performing a four wheel alignment After the rear is set center the steering wheel lock it in place then adjust the front camber caster and toe if applicable Tires Tires can have significant effect on vehicle tracking Arranging tires on a vehicle according to StraightTrak can greatly improve or eliminate a vehicle tracking condition Tires contribute to vehicle tracking in the following ways e Ply steer Ply steer is an inherent characteristic in a tire which results in a lateral force as the tire rolls Rotating the tires may aid in cancelling out the effects of ply steer e Conicity Tire conicity refers to the shape of the tire and how cone shaped it is This can influence vehicle tracking Conicity can be present in a new tire due to manufacturing or in a used tire due to Camber wear Weight The amount of weight and where the weight is placed alters a vehicle s alignment angles thus changing the tracking tendency It is important to consider this when diagnosing a vehicle tracking condition TSB 11 01 030 Page 5 of 21 SONATA YF VEHICLE TRACKING DIAGNOSIS AND REPAIR 16 AND 17 WHEEL VEHICLES ONLY SERVICE CAMPAIGN 928 Road Crown Every vehicle will have a tendency to follow road crown towards the low side of the crown Brake Drag If one side of a vehicle s brakes are dragging the vehicle can have a tracking tendency towards that si
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