Protect your transmission, differential, transfer case, manual gearbox, and drivetrain with premium AMSOIL synthetic transmission fluids and gear lubes built for heat, towing, cold weather, heavy loads, and long service life.
Shop Transmission Fluid Shop Gear LubeEngine oil gets most of the attention, but your transmission, differential, and transfer case work hard every mile. Heat, pressure, towing, hauling, cold starts, stop-and-go driving, and heavy loads can break down ordinary fluids and reduce protection.
AMSOIL synthetic transmission fluids and gear lubes are designed to help protect gears, bearings, clutches, seals, and internal components while supporting smoother shifting, cleaner operation, and reliable performance.
Synthetic transmission fluid offers key advantages compared to conventional transmission fluid, including improved wear protection, increased cleanliness, better heat resistance, and smoother cold-weather shifts. AMSOIL explains that synthetic transmission fluids are built from pure, uniform base oils rather than conventional crude-oil impurities.
Helps promote consistent, reliable shifting in hot and cold operating conditions.
Designed to resist breakdown from elevated temperatures, towing, heavy traffic, and demanding use.
Helps protect internal transmission components from friction, wear, and fluid breakdown.
Supports easier fluid flow and smoother operation when temperatures drop.
AMSOIL offers transmission fluids for many applications, including automatic transmissions, manual transmissions, CVTs, dual-clutch transmissions, heavy-duty trucks, and powersports equipment. The best option depends on the vehicle and manufacturer specification.
For cars, trucks, SUVs, towing, commuting, and daily driving applications.
Shop ATFFormulated for vehicles equipped with continuously variable transmissions where CVT fluid is required.
Shop CVT FluidProtection for manual gearboxes, synchronizers, gears, and bearings.
Shop Manual FluidTransmission and differential fluid requirements can vary by year, make, model, engine, transmission, axle, and drivetrain. The easiest way to avoid ordering the wrong product is to use the AMSOIL product guide.
AMSOIL SEVERE GEAR is built for differentials, manual transmissions, transfer cases, and gearboxes that need strong protection under heat, heavy loads, towing, hauling, off-road use, racing, and severe service.
AMSOIL states that SEVERE GEAR is designed to resist breakdown from extreme heat, helping prevent viscosity loss and acid, carbon, and varnish formation. Its wax-free formula also improves cold-flow performance for better cold-weather operation.
Helps protect heavily loaded gears and bearings from metal-to-metal contact.
Designed for hard-working differentials exposed to towing, hauling, high temperatures, and heavy loads.
Wax-free synthetic construction helps improve cold-flow properties in low temperatures.
Helps fight acid, carbon, varnish, and deposits that can form under severe heat.
AMSOIL gear lubes are commonly used in vehicles and equipment that place heavy stress on gears and bearings.
Transmission fluid and gear lube are not interchangeable unless the manufacturer specifically calls for that product type. Automatic transmissions, CVTs, manual transmissions, differentials, and transfer cases may all require different fluid specifications.
Often used in automatic transmissions, CVTs, manual transmissions, and some transfer cases. Requirements vary heavily by vehicle.
Typically used in differentials, gearboxes, and some manual transmissions or transfer cases where gear oil is specified.
The correct fluid depends on manufacturer requirements, viscosity, specifications, and application.
Use the AMSOIL lookup tool to find the correct transmission fluid, differential fluid, transfer case fluid, motor oil, filter, coolant, and other recommended products for your exact vehicle.
Synthetic Pros is an independent AMSOIL Dealer based in Central Minnesota.
Order directly through AMSOIL using our dealer link and have products shipped to your door.
Quickly find the correct fluid for your transmission, differential, transfer case, and engine.
Regular AMSOIL buyers can explore Preferred Customer pricing and qualifying shipping benefits.
Use the AMSOIL vehicle lookup tool and enter your year, make, model, engine, and drivetrain. Transmission fluid requirements vary by vehicle and specification.
Only if your vehicle manufacturer specifies gear lube for that transmission. Many automatic transmissions, CVTs, and some manual transmissions require specific transmission fluid instead.
SEVERE GEAR is commonly used in differentials, gearboxes, and other gear-driven components where the correct gear oil viscosity and specification are required.
Synthetic gear lube is a strong choice for towing and hauling because it is designed to handle heat, heavy loads, and severe operating conditions better than many conventional fluids.
Use the shopping links on this page or the AMSOIL product lookup tool. Products are ordered through AMSOIL and shipped directly to you.
Whether you drive a daily commuter, tow vehicle, diesel truck, performance car, 4x4, or work vehicle, AMSOIL transmission fluids and gear lubes help deliver strong synthetic protection where it matters.
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