Tire And Wheel RUNOUT/Match Mounting

1. Raise vehicle so tires clear floor. Refer to Vehicle Quick Reference/Hoisting - Standard Procedure .
2. Apply masking tape around the circumference of the tire in the locations to be measured (1). Do not overlap the tape.
3. Check system runout using Dial Indicator Set, Special Tool C-3339A with 25-W wheel, or equivalent. Place the end of the indicator against each taped area (one at a time) (2) and rotate the tire and wheel. See Fig 1. System radial runout should not exceed 0.76 mm (0.030 inch) with no tread "dips" or "steps." Tread "dips" and "steps" can be identified by spikes of the dial indicator gauge.
4. If system runout is excessive, re-index the tire and wheel assembly on the hub. Remove assembly from vehicle and install it back on the hub two studs over from original mounting position. If re-indexing the tire and wheel assembly corrects or reduces system runout, check hub runout and repair as necessary. Refer to Brakes/Hydraulic/Mechanical/ROTOR, Brake - Diagnosis and Testing .
5. If system runout is still excessive, continue with this diagnosis and testing procedure.

1. Remove tire and wheel assembly from vehicle and install it on a suitable wheel balancer.
2. Check system runout using Dial Indicator Set, Special Tool C-3339A with 25-W wheel, or equivalent. Place the end of the indicator against each taped area (one at a time) and rotate the tire and wheel. Radial runout should not exceed 0.76 mm (0.030 inch) with no tread "dips" or "steps." Tread "dips" and "steps" can be identified by spikes of the dial indicator gauge.
   Fig 2: Radial Runout Measurement

   Courtesy of CHRYSLER LLC

   1 - MASKING TAPE

   2 - DIAL INDICATOR

3. If runout exceeds limits, mark the original location of the tire on the wheel at the valve stem (1) (4). Also, mark the tire and wheel to indicate the original high spot (2) of the assembly and record the runout measurement.
   Fig 3: FIRST MEASUREMENT

   Courtesy of CHRYSLER LLC
4. If runout exceeds limits, the tire will need to be dismounted from the wheel to verify wheel vs. tire contribution. Refer to step  4 (Wheel Runout).

1. Dismount the tire from the wheel.
2. Mount the wheel back on the wheel balancer.
3. Measure radial runout of the wheel at the tire bead seat (1, 6). Runout should not exceed the specification limit listed in the following table. Replace the wheel if it exceeds the limit.
   Fig 4: CHECKING RADIAL RUNOUT OF WHEEL

   Courtesy of CHRYSLER LLC
4. Measure lateral runout of the wheel at the tire bead seat (1, 6). Runout should not exceed the specification limit listed in the following table. Replace the wheel if it exceeds the limit.
   Fig 5: CHECKING LATERAL RUNOUT OF WHEEL

   Courtesy of CHRYSLER LLC

1. Remount the tire on the rim 180 degrees from its original location. Ensure the tire bead is properly seated.
   Fig 6: 180 DEGREE REMOUNT

   Courtesy of CHRYSLER LLC
2. Re-measure the total runout. Mark the tire at the high spot and record the measurement.

Fig 7: 90 DEGREE REMOUNT

Courtesy of CHRYSLER LLC

If runout is still excessive, perform the following:

• If the new high spot is within 102 mm (4.0 inch) of the first high spot on the tire, replace the tire.
• If the new high spot is within 102 mm (4.0 inch) of the first high spot on the wheel, the wheel may be out of specification. Refer to step  4 (Wheel Runout).
• If the new high spot is NOT within 102 mm (4.0 inch) of either high spot, draw an arrow on the tread from new high spot toward the original (2). Break down the tire and remount it 90 degrees on rim in that direction, then re-measure runout. This will normally reduce the runout to an acceptable amount.