Due to supply chain constraints, some orders are experiencing longer than normal lead times. Please understand that we are working diligently to fulfill orders as timely as possible. We appreciate your understanding and thank you for your business.

INTERNATIONAL CREDIT CARDS: Unfortunately, our website does not accept international credit cards. If you have any questions, please contact us directly at (707) 745-6100.

 
Menu
Find Products
For My Vehicle
You have no items in your shopping cart.
Menu

75W140NS GL-5 Gear Oil

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

Check Compatibility

Didn't Find Your Vehicle?
Didn't Find Your Vehicle?
75W140 NS GL-5 Gear Oil
75W140 NS GL-5 Gear Oil
75W140 NS GL-5 Gear Oil

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
$23.53
Find Near You

Featured Retailers

JEGS
Summit
ECS Tuning

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

Data Sheet Downloads

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