For further information CHASSIS FLUIDS AND LUBRICANTS.
The presence of water in the gear lubricant will result in corrosion and possible failure of differential components. Operation of the vehicle in water, as may be encountered in some off-highway types of service, will require draining and refilling the axle to avoid damage.
Limited-Slip Differentials DO REQUIRE limited slip oil additive (friction modifiers).
Slight noise and mild shuddering may be evident while turning a vehicle with limited slip differential on concrete or dry pavement. These conditions should be considered normal operation of the limited slip differential.