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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 221 (Suspension General Diagnosis) >> Diagnostic Information and Procedures >> Wheel Bearings Diagnosis >> Special Tools

Special Tools

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Equivalent regional tools: Special Tools 

Step Action Values Yes No
1 Did you review the General Description and perform the necessary inspections? - Go to Step 2  Go to Symptoms - Suspension General Diagnosis 
2
  1. Install the CH-39570  Chassis Ear.
    2. IMPORTANT:

    A noise heard during left turns is a good indicator of a noisy right wheel bearing. A noise heard during right turns is a good indicator of a noisy left wheel bearing.

  2. Road test the vehicle to verify the location of the noise. Drive the vehicle on a smooth road at a moderate speed range. While driving, turn the wheel to the left and the right to apply loads to each wheel corner.
Is the noise present at the wheel bearing?		 48 - 72 kph (30 - 45 mph) Go to Step 7  Go to Step 3 
3
  1. Raise and support the vehicle. Lifting and Jacking the Vehicle
  2. Remove the tire and wheel. Tire and Wheel Removal and Installation
  3. Ensure the wheel drive shaft nut is properly tightened. Fastener Specifications
Are the nuts fastened to the correct specified value?		 - Go to Step 4  Go to Step 8 
4
    IMPORTANT:

    Support the vehicle by the lower control arms or the rear axle to prevent movement during wheel bearing/hub inspection.

  1. Mount and secure the GE-8001  Dial Indicator Set to the steering knuckle.
  2. Firmly push the hub flange towards the vehicle.
  3. Ensure that the dial indicator contacts the vertical surface of the hub as close as possible to the center of the flange.
  4. Firmly pull the hub flange away from the vehicle in order to inspect the total travel indicator by the dial indicator.
Is the measurement greater then the specified value?		 0.127 mm (0.005 in) Go to Step 7  Go to Step 5 
5 Inspect for tire or wheel damage. Tire and Wheel Assembly Runout Measurement - On-Vehicle
Did you find and correct the condition?		   Go to Step 9  Go to Step 6 
6 Inspect for suspension noises. Suspension Related Noise 
Did you find and correct the condition?		 - Go to Step 9  Go to Step 2 
7 Replace the affected wheel bearing and hub.
Did you complete the repair?		 - Go to Step 9  -
8 Remove the old wheel drive shaft nut and install a NEW wheel drive shaft nut and tighten to the specified value. Fastener Specifications
Did you complete the repair?		 - Go to Step 9  -
9 Road test the vehicle to verify the repair.
Does the vehicle operate normally?		 - System OK Go to Step 3 
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