GM Service Manual Online
For 1990-2009 cars only

Limited Slip Differential Diagnosis

Step

Action

Values

Yes

No

1

Did you review the general description and perform the necessary inspections?

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Go to Step 2

Go to Diagnostic Starting Point - Locking/Limited Slip Rear Axle

2

Measure the rotational force of the axle using the following procedure:

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the rear tire and wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  3. Using the J 28733-B Front/Rear Spindle Remover or equivalent, measure the rotational force of the axle.
  4. Repeat the procedure for the other axle shaft.

Does the rotational force measure below the specified value?

22-271 N·m

(30-200 lb ft)

Go to Step 3

System OK

3

Remove the differential cover and inspect the condition of the fluid. If the fluid is burnt, has a metallic color and/or contains particles, replace the differential assembly. Refer to Differential Replacement .

Did you complete the repair?

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Go to Step 4

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4

Operate the system in order to verify the repair.

Did you correct the condition?

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Go to Step 2

System OK