Monolec® Gear Lubricant

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 multi viscosity extreme pressure gear oil, Monolec Gear Lubricant was formulated to achieve the proper balance between load-carrying capacity, film strength and lubricity.

Beneficial Qualities

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

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Product Codes: LE703/LE704

Typical Applications

  • 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

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.