Limited Slip Axle Operation - Auburn Cone Type Differential

On all models, improper operation is often indicated by clutch slipping or grabbing which produces a whirring or chattering noise. These noises do not always indicate an axle failure but could be from lack of proper lubrication or normal noise when axle clutches are engaged during certain road conditions. Since the operational life of the limited slip unit is dependent on equal rotation of the wheels while driving straight ahead, it is important that there is no major difference in rear wheel tire size, air pressure or wear pattern, otherwise the vehicle may swerve during acceleration. If improper limited slip differential problems are not caused by the above, check for proper operation as follows:


1. With parking brake released and automatic transmission in park or manual transmission in gear, raise both tires off the floor.
2. Remove hubcap or wheel disc and apply torque wrench and axle shaft puller tool No. J-21579 to either wheel. Measure torque required to rotate one wheel. The torque should be between 125 and 225 ft. lbs.
3. Place transmission in neutral position, then lower one rear tire to the ground.
4. Measure torque required to rotate the raised wheel. On full size wagons and sedans, torque should be between 45 and 110 ft. lbs. On Camaro and Firebird models, torque should be between 44 and 66 ft. lbs.
5. The differential case must be replaced as a unit if proper specifications are not obtained.