Extreme Pressure Gear Lubricant Meets Demanding Requirements of Most Differentials and Transmissions

Monolec® Gear Lubricant (703-704) offers the versatility of one product that meets the demanding fleet requirements of all types of differentials (including limited slip) and transmissions, as well as most industrial enclosed gearboxes. A multiviscosity extreme pressure gear oil, Monolec Gear Lubricant was formulated to achieve the proper balance between load-carrying capacity, film strength and lubricity.

Unit of Measure

Benefits and Recommendations

Available Container Size

N/A Single Quart

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Beneficial Qualities

N/A Wear Prevention
  • Provides exceptional wear resistance, ensuring longer gear life and less maintenance expense
  • Possesses high film strength, keeping metal surfaces separated
  • Offers outstanding rust and corrosion resistance
Long-Lasting Reliable Service
  • Provides superior oxidation stability and long life
  • Maintains low operating temps by reducing friction
  • Breaks up foam bubbles as they form
  • Separates readily from water
  • Prevents sludge deposits
  • Extends drain intervals with less make-up between drains
  • Does not affect seals
  • Multiviscosity for use in all seasons
  • Delivers exceptional performance in most types of gearboxes
  • Can be used in most differentials and transmissions
Available Grades
  • SAE 80W-90 (703)
  • SAE 85W-140 (704)
  • Proprietary Additive


    LE’s proprietary additives are used exclusively in LE lubricants. Monolec® Gear Lubricant contains Monolec.

    Monolec® wear-reducing additive creates a single molecular lubricating film on metal surfaces, vastly increasing oil film strength without affecting clearances. An invaluable component in LE’s engine oils, industrial oils and many of its other lubricants, Monolec allows opposing surfaces to slide by one another, greatly reducing friction, heat and wear.

    Performance Requirements Met or Exceeded

    • AGMA 9005-D94
    • API GL-5 & MT-1
    • CS-3000B
    • Diamond Power Soot Blower
    • Mack GO-H
    • PG-2
    • Rockwell (0-76-D, 0-76-A)
    • SAE J2360 (April 2012)
    • USDA H2


    • Not an automatic transmission, hydraulic or semi-automatic transmission oil
    • Not for use in common sump systems that use combination gear-hydraulic oil, hydraulic oil or a power steering fluid

    Typical Applications

    • All differentials and transmissions specifying an EP lubricant (except those requiring pure mineral oil), including:
      • Over-the-road and stop-and-go fleets
      • Off-highway equipment transfer cases, overdrive units, oil-lubricated wheel bearings and steering gearboxes
      • Limited slip differentials
      • Rockwell and Eaton axles
      • Heavily loaded industrial gearboxes
      • Any gearboxes that have bronze gears, thrust washers or other parts that require an EP gear oil
      • Worm gearboxes calling for EP gear oils
      • Especially appropriate for machine tools and other precision gearing because low wear rate keeps them within specification longer

    Asset Reliability Solutions

    N/A Reliability Solution Products

    Customer Testimonials

    N/A 0703 & 704 Lincoln Paving
    0703 704 1275 8800 PJS Trucking
    0703 Agriculture Service Co
    0703 N & L Transportation Inc

    Physical Characteristics - Typical


    N/A Red

    SAE Grade

    N/A 80W-90

    Performance Test Results

    Relative Density @ 60ºF/60ºF, ASTM D1298

    N/A 0.884

    Viscosity @ 100°C, cSt, ASTM D445

    N/A 15.12

    Viscosity @ 40°C, cSt, ASTM D445

    N/A 155.5

    Viscosity Index ASTM D2270

    N/A 95

    Viscosity-Brookfield @-26°C, cP, ASTM D2983

    N/A ≤150,000

    Flash Point °C (°F), (COC), ASTM D92

    N/A 198 (388)

    Pour Point °C (°F), ASTM D97

    N/A -27 (-17)

    Copper Corrosion 3 hrs@ 121ºC, ASTM D130

    N/A 1b

    Timken OK Load lbs, ASTM D2782

    N/A 70

    Acid Number mg KOH/g, ASTM D664

    N/A 1.0

    Evaporation 22 hrs @ 100ºC, % loss, ASTM D972

    N/A 1.3