Toyota Genuine Differential Gear Oil LX 75W-85 GL-5
The short answer
Toyota Genuine Differential Gear Oil LX 75W-85 GL-5 is a Toyota-branded gear oil for differentials, the gear assemblies that let the driven wheels turn at different speeds through corners. It is the right choice only if your vehicle's service specification calls for this exact product or for a 75W-85 GL-5 oil with the LX designation. Model year, market, trim, drivetrain and differential type can change which oil Toyota specifies, so confirm the requirement for your specific vehicle before you buy or fill.
What the name on the label means
75W-85: an SAE viscosity grade. The number before the W indicates cold-temperature performance, and the number after it indicates thickness at operating temperature. A 75W-85 oil is a multigrade gear oil meant to flow at low temperatures while keeping a specified thickness when warm. GL-5: an API service category for gear oils. It covers hypoid gears, which are the angled ring-and-pinion gears common in differentials and which run under high sliding pressure. GL-5 oils carry extreme-pressure additives intended for that load. LX: a Toyota product designation that separates this oil from other Toyota differential oils of the same viscosity grade. The material supplied for this article does not explain what LX signifies or which differentials Toyota assigns it to.
Conditions that change the answer
Front and rear differentials, transfer cases, and manual transmissions on the same vehicle may each call for a different oil. A matching viscosity and GL-5 rating does not by itself make two Toyota gear oils interchangeable. Differentials with a limited-slip mechanism can have additional friction requirements. Specifications can also differ between markets and change across model years of the same nameplate. For these reasons, the service specification for your exact vehicle and component should decide the oil, not the viscosity grade alone.
How to confirm it fits your vehicle
Check the owner's manual or official service information for the fluid specified for the differential you are servicing, front or rear. Give a Toyota or Lexus parts counter your vehicle identification number. A VIN-based lookup accounts for market, model year, trim and drivetrain. Confirm whether the differential is a limited-slip type and whether that changes the specified oil. Get the fill capacity from the service specification for your vehicle rather than from general sources, because capacity varies by differential and model.
Information not covered here
The supplied material does not include a list of vehicles that specify this oil, Toyota part numbers, container sizes, fill capacities, service intervals, prices, availability, or test data comparing it with aftermarket 75W-85 GL-5 oils. Treat any claim about those details as unverified until you check it against Toyota service information or a VIN-based parts lookup.