Its flexible design lets you easily reach touch-to-reach fill holes while getting all the gear lube out of the package. Not only does it often cost less than OEM-branded gear lubes, our SEVERE GEAR easy-pack eliminates the frustrations of changing gear oil. It maintains viscosity better than other conventional and synthetic gear lubes despite rigorous use and it contains advanced anti-wear additives for further protection. Most manufacturers recommend changing differential fluid more often in severe service, such as frequent towing or hauling, particularly in hot weather.īottom line: Use a high-quality synthetic gear lube to maximize your truck’s ability to tow and haul.ĪMSOIL SEVERE GEAR® Synthetic Gear Lube is specifically designed for severe service. Severe operation requires more frequent differential fluid changes Friction and heat continue to spiral upward, creating a vicious cycle known as thermal runaway that eventually leads to greatly increased wear and irreparable equipment damage. Meanwhile, extreme loads and pressures can break the lubricant film, causing increased metal-to-metal contact and heat. Increased temperatures are also a challenge.Īs temperatures climb, gear lubricants tend to lose viscosity. Genuine Differential / Axle Oil LRN7591, 75W90R GL5 Fluid, 1 Quart, For Land Rover LR3, Freelander, Range Rover Sport, And Range Rover Full Size (See Fitment. Once sheared, the fluid film weakens, ruptures and allows metal-to-metal contact, eventually causing gear and bearing failure. In this environment, inferior lubricants can shear and permanently lose viscosity. It means less fluid is responsible for guarding against increased heat and stress. towing capacity using a rear differential that holds between 3.1 and 3.1 liters of fluid. using a rear differential that held 3.5 liters of gear lube. Back in 1996, maximum towing capacity was 4,750kg. Meanwhile, differential fluid capacities have largely decreased or remained the same.įor example, compare a 1996 Ford F-250 Crew Cab to the 2021 version. The truck manufacturer’s ongoing arms race for the highest towing capacity has resulted in trucks that place more stress on differentials than their predecessors. Why the varying fluid-change intervals? Because severe operating conditions break down differential fluid more quickly and place greater stress on the gears and bearings, inviting wear. The only way to know the exact mileage interval is to check your owner’s manual or visit the dealership.įind the perfect oil for your car with our Look up Guide How often you should change front and rear differential fluid depends on your vehicle, driving conditions and differential fluid quality.īut, if you tow a trailer or haul supplies frequently and the temperature fluctuates as wildly as your health insurance, then you need to change differential fluid more often. The only way to know the exact mileage interval is to check your owner’s manual or visit the dealership. If you drive your truck primarily on the highway in temperate conditions and rarely tow or haul, you likely don’t need to change front or rear differential fluid very often.īut, if you live in any place like the UK or Scotlands where temperatures tend to fluctuate wildly, and you tow a trailer or haul supplies frequently, then you need to change differential fluid more often.
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