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Various 1997-2008 vehicles equipped with either 4 wheel drive or all wheel drive and equipped with control trac may exhibit a shudder on acceleration/deceleration, binding in slow speed turns or noise from the front driveline and/or transfer case. The shudder/binding will occur with the vehicle being operated in the awd/auto 4×4 mode. The shudder/binding may be due to incorrect tire circumference or improper tire inflation pressures. ACTION: Follow the Service Procedure steps to correct the condition. SERVICE PROCEDURE NOTE: THIS DOES NOT APPLY TO 2006-2008 MOUNTAINEER WITH A 4.0L ENGINE OR 2007-2008 EXPLORER AND SPORT TRAC WITH 20 INCH WHEELS. Review the tire label for correct tire size and tire inflation pressures located at the B-Pillar of the driver’s door. If the tire size does not match the label, this procedure does not apply, follow normal Workshop Manual (WSM) diagnostics. If the tire size is correct, ensure tire pressures are within specifications. Raise the vehicle on the hoist, refer to Workshop Manual, Section 100-02. Disconnect all wiring going to the transfer case and road test. Is the shudder/binding present? a. If the shudder/binding is still present, do not contine with this procedure, continue with WSM normal diagnostic for 4X4. b. If the shudder/binding is gone, proceed to Step 7. 7. Raise the vehicle on the hoist and reconnect all the wiring previously disconnected. 8. Using a tailor’s tape or flexible measuring tape and measure the circumference of all four (4) tires and record the measurements. (Figure 1) 1. 2. 3. 4. 5. 6. 10. If the difference between these two averages is greater than 1/2″ (12.7 mm), front to back or side to side, replace the smallest circumference tire(s) and remeasure the tire averages. Refer to WSM, Section 204-04 for tire replacement.

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NOTE: To ensure a proper repair and proper reimbursement, you must read this entire service bulletin before doing any work. SYMPTOM The customer may complain of uneven or rapid rear tire wear, a roaring noise from the rear, and/or a vibration at highway speeds. PROBABLE CAUSE The combination of the tires and the rear suspension geometry may cause rapid and uneven rear tire wear. Tires in an advanced stage of this diagonal or inner edge wear may cause vibration and/or a bad bearing type noise. (For more details, see TIRE INSPECTION AND QUALIFICATION on page 2). CORRECTIVE ACTION Install a rear upper control arm kit, replace the flange bolts, replace the worn tires (see the Tire Replacement Information chart on this page), and do a four-wheel alignment. TIRE INSPECTION AND QUALIFICATION Diagonal Wear Lines The tire is no longer round. There are high and low spots on the tire, worn in a diagonal pattern across the tread.

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Models ‘04 – ‘05 Highlander, RAV4, Sienna, & Solara, ‘05 Scion tC This service bulletin provides the proper procedures for normal maintenance re- initialization of the indirect Tire Pressure Warning System (TPWS). When performing service that requires tire rotation or tire replacement, suspension component replacement or alignments, the Tire Pressure Warning System must be re-initialized. During initialization, the Tire Pressure Warning System, located within the ABS or Skid Control ECU, learns the tire sizes from rotational speeds and resonance frequencies.