For servicing a limited slip differential, which fluid is most correct to use according to OEM guidance?

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Multiple Choice

For servicing a limited slip differential, which fluid is most correct to use according to OEM guidance?

Limited-slip differentials rely on a lubricant with a precise specification to achieve proper clutch engagement, heat management, and component protection. Using the OEM recommended lubricant provides the exact viscosity and additive package the differential was designed for, ensuring correct operation of the clutch packs, seals, and gears. This choice supports proper lockup behavior and long-term durability, and it aligns with the manufacturer’s warranty and service guidelines. Other fluids don’t meet those design requirements: ATF has a different viscosity and additive profile that can alter the LSD’s behavior and wear; mineral oil generally lacks the necessary friction modifiers and compatibility; water cannot provide lubrication and will cause corrosion and failure. Therefore, following the OEM recommended lubricant is the best option.

Limited-slip differentials rely on a lubricant with a precise specification to achieve proper clutch engagement, heat management, and component protection. Using the OEM recommended lubricant provides the exact viscosity and additive package the differential was designed for, ensuring correct operation of the clutch packs, seals, and gears. This choice supports proper lockup behavior and long-term durability, and it aligns with the manufacturer’s warranty and service guidelines.

Other fluids don’t meet those design requirements: ATF has a different viscosity and additive profile that can alter the LSD’s behavior and wear; mineral oil generally lacks the necessary friction modifiers and compatibility; water cannot provide lubrication and will cause corrosion and failure. Therefore, following the OEM recommended lubricant is the best option.

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