Ultra HD Gear Oil 85W-140
The Ultra Gear Oil HD 85W140 is a professional-grade lubricant designed to ensure the longevity and peak efficiency of critical driveline components. Engineered to exceed the demanding API GL-5 standard, this oil provides the essential extreme-pressure additives required to prevent scuffing and welding of hypoid gears under intense mechanical stress.
This high-performance formula is specifically optimized for Limited Slip Differentials (LSD), ensuring smooth power transfer and quiet operation even in heavy-duty applications. The 85W140 viscosity rating ensures that the oil remains stable and maintains a thick protective barrier, reducing friction and heat buildup during sustained high-load or high-speed operation. Housed in a durable 1 U.S. Quart (946 mL) bottle, Ultra HD Gear Oil is the definitive choice for mechanics and vehicle owners who demand uncompromising protection for their heavy-duty hardware.
Key Benefits:
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Exceptional Pressure Resistance: Formulated to handle the high torque and shock loads common in commercial, agricultural, and off-road vehicles.
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Optimized LSD Performance: Contains specialized additives to work seamlessly with limited-slip clutches, reducing chatter and ensuring consistent traction.
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Thermal and Oxidative Stability: Resists breakdown and sludge formation at high temperatures, extending the interval between oil changes.
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Extended Component Life: Minimizes wear on gears and bearings, significantly reducing the risk of expensive mechanical failures.
Perfect For:
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Heavy-Duty Trucks: Reliable protection for rear differentials under constant towing or hauling loads.
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Industrial Gearboxes: Ensuring smooth operation for heavy machinery in manufacturing and construction settings.
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Performance Vehicles: Maintaining traction and cooling in vehicles equipped with high-torque limited-slip differentials.
Application Instructions:
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Refer to your vehicle or equipment owner’s manual to confirm the required oil specifications and capacity.
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Drain the old gear oil completely into a suitable waste container while the system is at operating temperature.
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Clean the drain plug and surrounding area before reinstallation.
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Fill the differential or gearbox with Ultra Gear Oil HD 85W140 until it reaches the manufacturer’s specified fill level.
Pro Tips:
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Check Seals Regularly: Heavy-duty gear oil is thicker; ensure your differential seals are in good condition to prevent leaks and maintain proper lubrication levels.
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Temperature Stability: While 85W140 provides superior protection in heat, allow for a brief warm-up period in extremely cold climates to ensure the oil is flowing optimally through the gear sets.
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Pair with Quality Maintenance: For complete driveline care, inspect your universal joints and grease them with Abro Super Blue Lithium Grease during every oil change.
Technical Specifications:
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Brand: Ultra.
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Product Type: Heavy Duty Gear Oil / LSD Oil.
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Viscosity Grade: 85W140.
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Service Rating: API GL-5.
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Volume: 1 U.S. Quart (946 mL).
Keywords: Ultra gear oil, 85W140 lubricant, API GL-5 oil, limited slip differential oil, HD gear fluid, 946mL gear oil, high speed gear lubricant, hardwarett.com.

































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