Robust Formula Provides Long-Lasting Protection in Severe Service, including High & Low Temperatures

Monolec® Syn Gear Oil (9919 & 9923) is a 100 percent synthetic, limited slip gear oil with a high-performance additive package, making it an ideal choice for transmissions and differentials that encounter severe service conditions, including fleets of delivery trucks, heavy-duty pickup trucks, school buses, and bucket trucks. Its high-performance formula will not break down in severe service. It resists gear and bearing wear, viscosity loss, foaming, high-temperature oxidation, and volatility, allowing it to deliver long-lasting protection for any application where extreme pressure and shock loading is expected, including industrial gearboxes that require
enhanced EP protection.

In addition, Monolec Syn Gear Oil’s high-performance formula features a high viscosity index and low pour point that work together to provide high-temperature
film thickness and low-temperature fluidity, allowing it to be used in a wide range of environments – from very hot to below freezing.

Unit of Measure
Items
Drums/Pails/Grease/Quarter Drums

Monolec® Syn Gear Oil 9919
List Price QUOTE

Drums/Pails/Grease/Quarter Drums

Monolec® Syn Gear Oil 9919
List Price QUOTE

Drums/Pails/Grease/Quarter Drums

Monolec® Syn Gear Oil 9923
List Price QUOTE

Drums/Pails/Grease/Quarter Drums

Monolec® Syn Gear Oil 9923
List Price QUOTE
Available Container Size N/A Pail N/A Drum N/A Pail N/A Drum
Buy this LE Product! N/A
GHS Statement N/A For commercial and professional use only
Beneficial Qualities N/A

Delivers Exceptional Limited
Slip Performance

  • Eliminates “chatter” or “squawk”
    that results from improper
    lubrication of limited slip
    differentials
  • Provides smooth engagement of
    friction plates
  • Maintains limited slip
    performance throughout life of oil

Provides Reliable, Long-Lasting Service

  • Resists shearing and maintains
    viscosity in service
  • Remains thermally stable
  • Prevents formation of carbon deposits
  • Reduces operating temps by
    transferring heat from gears
  • Protects gears from wear, heavy
    loads and shock loading
  • Increases equipment reliability,
    reducing replacement and
    repair costs
  • Suppresses foam

Performs in High
and Low Temperatures

  • Extends drain intervals due to long oil life
  • Requires less make-up oil due to low volatility
  • Reduces environmental impact with less waste oil for disposal
  • Reduces maintenance and
    replacement costs by reducing wear
N/A

Delivers Exceptional Limited
Slip Performance

  • Eliminates “chatter” or “squawk”
    that results from improper
    lubrication of limited slip
    differentials
  • Provides smooth engagement of
    friction plates
  • Maintains limited slip
    performance throughout life of oil

Provides Reliable, Long-Lasting Service

  • Resists shearing and maintains
    viscosity in service
  • Remains thermally stable
  • Prevents formation of carbon deposits
  • Reduces operating temps by
    transferring heat from gears
  • Protects gears from wear, heavy
    loads and shock loading
  • Increases equipment reliability,
    reducing replacement and
    repair costs
  • Suppresses foam

Performs in High
and Low Temperatures

  • Extends drain intervals due to long oil life
  • Requires less make-up oil due to low volatility
  • Reduces environmental impact with less waste oil for disposal
  • Reduces maintenance and
    replacement costs by reducing wear
N/A

Delivers Exceptional Limited
Slip Performance

  • Eliminates “chatter” or “squawk”
    that results from improper
    lubrication of limited slip
    differentials
  • Provides smooth engagement of
    friction plates
  • Maintains limited slip
    performance throughout life of oil

Provides Reliable, Long-Lasting Service

  • Resists shearing and maintains viscosity in service
  • Remains thermally stable
  • Prevents formation of carbon deposits
  • Reduces operating temps by
    transferring heat from gears
  • Protects gears from wear, heavy
    loads and shock loading
  • Increases equipment reliability, reducing replacement and repair costs
  • Suppresses foam

Performs in High and Low Temperatures

  • Provides high-temperature oxidation resistance
  • Is reliable for low-temperature startups
  • Flows well at below freezing
    conditions

Reduces Oil Consumption
& Other Costs

  • Extends drain intervals?due to long oil life
  • Requires less make-up oil
    due to low volatility
  • Reduces environmental impact
    with less waste oil for disposal
  • Reduces maintenance and
    replacement costs by reducing wear
N/A

Delivers Exceptional Limited
Slip Performance

  • Eliminates “chatter” or “squawk”
    that results from improper
    lubrication of limited slip
    differentials
  • Provides smooth engagement of
    friction plates
  • Maintains limited slip
    performance throughout life of oil

Provides Reliable, Long-Lasting Service

  • Resists shearing and maintains viscosity in service
  • Remains thermally stable
  • Prevents formation of carbon deposits
  • Reduces operating temps by
    transferring heat from gears
  • Protects gears from wear, heavy
    loads and shock loading
  • Increases equipment reliability, reducing replacement and repair costs
  • Suppresses foam

Performs in High and Low Temperatures

  • Provides high-temperature oxidation resistance
  • Is reliable for low-temperature startups
  • Flows well at below freezing
    conditions

Reduces Oil Consumption
& Other Costs

  • Extends drain intervals?due to long oil life
  • Requires less make-up oil
    due to low volatility
  • Reduces environmental impact
    with less waste oil for disposal
  • Reduces maintenance and
    replacement costs by reducing wear
Proprietary Additive N/A

LE’s proprietary additives are used exclusively in LE lubricants. Monolec®
Syn Gear Oil 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. 

N/A

LE’s proprietary additives are used exclusively in LE lubricants. Monolec®
Syn Gear Oil 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. 

N/A

LE’s proprietary additives are used exclusively in LE lubricants. Monolec®
Syn Gear Oil 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.

N/A

LE’s proprietary additives are used exclusively in LE lubricants. Monolec®
Syn Gear Oil 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 N/A
  • API GL-5
  • API MT-1
  • Service Fill Limited Slip
  • USDA H2
  • ZF TE-ML 07A
  • ZF TE-ML 08
Typical Applications N/A
  • Differentials & non-synchronized transmissions in:
    • Over-the-road fleets
    • Off-highway equipment
    • Stop-and-go vehicles
    • All trucks that fall within the DOT Gross Vehicle
      Weight Rating of Class 1 to Class 6.
  • Industrial gearboxes and worm drives that:
    • Call for SAE 75W-90 gear oil (9919)
    • Call for SAE 75W-140 gear oil (9923)
    • Are subjected to low and/or high temperatures
N/A
  • Differentials & non-synchronized transmissions in:
    • Over-the-road fleets
    • Off-highway equipment
    • Stop-and-go vehicles
    • All trucks that fall within the DOT Gross Vehicle
      Weight Rating of Class 1 to Class 6.
  • Industrial gearboxes and worm drives that:
    • Call for SAE 75W-90 gear oil (9919)
    • Call for SAE 75W-140 gear oil (9923)
    • Are subjected to low and/or high temperatures
N/A
  • Differentials & transmissions in:
    • Over-the-road fleets
    • Off-highway equipment
    • Stop-and-go vehicles
    • All trucks that fall within the DOT Gross Vehicle Weight Rating of Class 1 to Class 6
  • Industrial gearboxes and worm drives that:
    • Call for SAE 75W-90 gear oil (9919)
    • Call for SAE 75W-140 gear oil (9923)
    • Are subjected to low and high temperatures
N/A
  • Differentials & transmissions in:
    • Over-the-road fleets
    • Off-highway equipment
    • Stop-and-go vehicles
    • All trucks that fall within the DOT Gross Vehicle Weight Rating of Class 1 to Class 6
  • Industrial gearboxes and worm drives that:
    • Call for SAE 75W-90 gear oil (9919)
    • Call for SAE 75W-140 gear oil (9923)
    • Are subjected to low and high temperatures
Asset Reliability Solutions N/A Reliability Solution Products
Color N/A Green
SAE Grade N/A 75W-90 N/A 75W-90 N/A 75W-140 N/A 75W-140
Relative Density @ 60ºF/60ºF, ASTM D1298 N/A 0.871 N/A 0.871 N/A 0.891 N/A 0.891
Viscosity @ 100°C, cSt, ASTM D445 N/A 15.0 N/A 15.0 N/A 26.0 N/A 26.0
Viscosity @ 40°C, cSt, ASTM D445 N/A 100.0 N/A 100.0 N/A 190.0 N/A 190.0
Viscosity Index ASTM D2270 N/A 157 N/A 157 N/A 171 N/A 171
Viscosity-Brookfield @ -40ºC, cP, ASTM D2983 N/A ≤50,000 N/A ≤50,000 N/A ≤150,000 N/A ≤150,000
Flash Point °C (°F), (COC), ASTM D92 N/A 226 (429) N/A 226 (429) N/A 220 (428) N/A 220 (428)
Pour Point °C (°F), ASTM D97 N/A -54 (-65) N/A -54 (-65) N/A -45 (-49) N/A -45 (-49)
Copper Corrosion 3 hrs @ 100ºC, ASTM D130 N/A 1b
Timken OK Load lbs, ASTM D2782 N/A 90
FZG Scuffing Load Capacity Fail Stage, ASTM D5182 N/A >12