Product Overview
Full Synthetic SAE 75W-90 Heavy Duty Gear Lubricant is a multi-grade synthetic oil built for axles, differentials, manual transmissions, and industrial gearboxes that operate under sustained load. The 75W-90 viscosity grade means it flows readily at low temperatures while maintaining film strength at operating heat — a direct advantage for equipment that starts cold and runs hard.
we distribute this lubricant in our Taylor, TX warehouse and ship it daily in sizes from single quarts to 55-gallon drums. Buyers range from fleet maintenance shops running differential services to plant engineers specifying gearbox fills on production lines. If your equipment OEM calls for an SAE 75W-90 GL-rated gear oil, this is the product.
Why This Viscosity Grade
The SAE 75W-90 designation tells you two things at once. The "75W" is the winter (cold-flow) rating — this oil will pour and circulate at sub-zero startup temperatures without starving gears during the critical first seconds of operation. The "90" is the operating-temperature rating, meaning it holds viscosity high enough to keep a protective film between tooth surfaces under full load and heat.
That dual rating is why 75W-90 has become the default specification for most modern light- and medium-duty differentials. It replaces older single-grade 90-weight oils with better cold-start protection while matching their hot-film strength. For heavy equipment that sees wide temperature swings — think a loader that sits overnight at 10 °F and runs all day at full torque — this grade covers both ends without a seasonal oil change.
Full synthetic base stocks extend that window further than conventional mineral oils can. The molecular uniformity of synthetics resists shearing under load, so the oil stays in grade longer between drain intervals. For fleet operations tracking cost per mile, that translates directly to fewer service events and less downtime.
Chemical Profile
This gear lubricant is a clear amber viscous liquid with a mild petroleum odor, characteristic of highly refined synthetic hydrocarbon base stocks (CAS 64742-54-7). Its density is approximately 0.86 g/cm³, making it lighter than water — and it is insoluble in water, so it will not emulsify under incidental moisture contact in a gearbox housing. Vapor pressure is negligible at ambient temperature, which means minimal evaporative loss during storage or in vented gear cases. The liquid form is ready to pour directly into fill ports with no mixing or dilution required.
Industrial Applications
This lubricant serves any application where an SAE 75W-90 gear oil is specified. The most common uses we see from our customer base:
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Automotive differentials and manual transmissions. The primary use case. This oil fills rear axles, front differentials, and synchronized manual gearboxes in passenger vehicles, pickups, and light trucks. It reduces friction between hypoid gear sets and synchronizer rings, protecting against scoring and pitting under torque.
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Heavy equipment gearboxes. Loaders, excavators, and haul trucks with enclosed gear drives benefit from the synthetic base stock's resistance to thermal breakdown. Equipment operating in continuous-duty cycles — aggregate plants, earthmoving — puts sustained heat into gear oil that a synthetic handles better than conventional mineral oil.
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Industrial gear systems. Enclosed gearboxes on conveyors, mixers, and roll mills require a gear oil that maintains film strength at operating temperature while resisting oxidation over long fill intervals. The low pour point also matters for plants that shut down over weekends in cold climates.
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Marine gear applications. Stern drives, inboard reduction gears, and marine transmissions operate in high-humidity environments where water intrusion is a constant threat. This oil's water insolubility and corrosion-inhibiting additive package protect ferrous gear surfaces from rust pitting.
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Off-road and recreational vehicles. ATVs, UTVs, and off-road trucks subject their drivetrains to shock loads, steep inclines, and temperature extremes. A 75W-90 synthetic maintains protection across that full envelope without the viscosity breakdown that conventional oils experience under high shear.
Handling & Storage
This product does not meet the hazardous criteria set forth by the 2012 OSHA Hazard Communication Standard (29 CFR 1910.1200). There is no GHS signal word, and no hazard pictograms apply. That said, standard industrial hygiene practices apply to any petroleum product:
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PPE: Wear chemical-resistant gloves (nitrile is fine) and safety glasses when pouring or transferring. Prolonged or repeated skin contact with any lubricant can cause irritation — wash exposed skin with soap and water.
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Ventilation: Use in well-ventilated areas. While vapor pressure is negligible, misting during spray application or heated transfer can generate inhalable aerosol.
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Storage: Keep containers sealed in a cool, dry location away from direct sunlight and heat sources. HDPE or steel containers are suitable. Avoid storing near strong oxidizers. Shelf stability is excellent when sealed — synthetic base stocks resist oxidation far longer than conventional mineral oils in storage.
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Incompatibilities: Do not mix with other lubricants unless compatibility has been confirmed. Mixing synthetics with conventional gear oils or lubricants of different additive chemistries can reduce performance or cause additive dropout.
Hazmat & Shipping
Canonical transport status is not regulated. Review the current SDS and carrier requirements before shipment.
Documentation
A Safety Data Sheet (SDS) in English ships with every order. The SDS covers composition, first-aid measures, firefighting guidance, and disposal considerations per GHS formatting requirements.
A lot-specific Certificate of Analysis (COA) is available on request, documenting the analytical results for your specific shipment. If you need a COA for incoming QC or customer audit purposes, request it at time of order and we will include it with your shipping documents.
A Technical Data Sheet (TDS) is also available, providing the full specification table for this product — viscosity at 40 °C and 100 °C, viscosity index, pour point, flash point, and any applicable industry specifications the formulation meets.
Why Buy from Alliance Chemical
We are a chemical distributor operating out of Taylor, TX, and we ship this product daily. Our warehouse team handles gear lubricants alongside DOT-regulated hazmat every day — we know how to pack, label, and ship chemicals correctly because that is our core operation, not a sideline. All shipping and handling guidance on this page has been reviewed by Andre Taki, DOT Hazmat Specialist.
You get the product in the size you need — from a single quart for a one-off service job to a 55-gallon drum for a plant fill program — with documentation that meets your receiving and QC requirements. we distribute it, we pack it, and we stand behind what we ship.
