Attention Red Line Oil customers: Please be advised that we are not accepting walk-in customers at our Benicia office at this time due to COVID-19. You may place an order at redlineoil.com or call us at (707) 745-6100. All orders will be shipped to your requested address at our standard shipping rate. We apologize for the inconvenience and hope to open our doors again to you in the near future. Thank you for supporting Red Line Oil, we appreciate your business.

 
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75W140NS GL-5 Gear Oil

75W140NS GL-5 Gear Oil

Big protection but not slippery, for certain trans and diff applications.

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75W140NS GL-5 Gear Oil

  • Contains extreme pressure additives like our 75W140 GL-5 oil, but lacks friction modifiers to balance slipperiness
  • Popular for historic and vintage transmissions, like Mid-1930s to early-1950s synchro-equipped gearboxes in cars and trucks
  • Helps with noisy or rough shifting in troubled A-833 Dodge/Plymouth 4-speed transmissions from 1964 to 1969
  • Option for noisy transmissions when mixed with 75W90NS or MT-90 to bring viscosity level up
  • Also used in clutch-type limited slip differentials in racing for maximum lock up-some users add Limited Slip Friction Modifier in small doses to customize slippage
  • Non corrosive formula, safe for use with all synchro materials
$18.95
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Since most GL-5 gear oils for differentials are too slippery for manual transmissions, Red Line offers these products that ensure proper shifting while providing ultimate wear protection

  • Appropriate coefficient of friction for most manual transmission synchronizers (other's synthetic gear oils are often too slippery for proper synchro engagement)
  • Red Line offers lubricants to pinpoint nearly every transmission application
  • MT-LV, MTL, MT-85 & MT-90 are not for use in differentials with hypoid gears
  • Excellent gear and synchro protection, balanced slipperiness for easier shifting in cold climates
  • Excellent for high- and low-mile transmissions
  • Compatible with petroleums and other synthetics

Typical Properties

API Service Class GL 5+
SAE Viscosity Grade (Gear Oil) 75W140
Vis @ 100°C, cSt 26.9
Vis @ 40°C, cSt 162
Viscosity Index 200
Pour Point, °C -45
Pour Point, °F -49
Brookfield Viscosity, Poise 1200 @-40°C

Available Sizes

Quart 57104
Gallon 57105
5 Gallon* 57106
16 Gallon* 57107
55 Gallon* 57108

*Only available from our dealers

Suitable replacement for:

API GL-5 & MT-1
MIL-PRF-2105E
SAE J2360

Historic & Vintage Synchro Transmissions
Rockwell 0-76-C
Used in SAE 140 Applications