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Red Line Synthetic 75W140NS GL-5 Manual Transmission Fluid

Red Line 75W140NS offers big protection but not slippery, for certain trans and diff applications.
Variant Title Product Code
Red Line 75W140NS GL-5 Manual Transmission Fluid - 1 US Quart (0.946 Litre) redline-57104
Red Line 75W140NS GL-5 Manual Transmission Fluid - 2 x 1 US Quart (1.892 Litres) redline-57104#2
Red Line 75W140NS GL-5 Manual Transmission Fluid - 3 x 1 US Quart (2.838 Litres) redline-57104#3

Availability: In Stock

RRP: £22.50

Our Price From Excl. VAT: £16.88 From Incl. VAT: £20.26

You Save: £2.24 (10%)

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Product Description


  • 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

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
  • 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

OEM Compatiability

Suitable replacement for:

API GL-5 & MT-1
SAE J2360

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



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