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Manual Transmission Fluid
Red Line Oil's MTL and MT-90 are designed to provide excellent protection and improved shiftability for manual transmissions
and transaxles, having cured the problem of hard shifting in thousands of transmissions with shifting troubles. How? They have
the appropriate coefficient of friction for most manual transmission synchronizers (many gear oils, engine oils, and ATFs are
too slippery for proper synchro engagement). And, the wide viscosity of MTL and MT-90 allow proper shifting over the entire
temperature range which the transmission will experience. The synthetic base oils used have a very high viscosity index which
provides relatively constant viscosity as temperature changes. MTL is a low 70W at very low temperatures and a high 80W, nearly
an 85W, at elevated temperatures, providing adequate viscosity to prevent wear and deaden gear noise. MT-90 is a thicker 75W90
version of MTL. The shear stability and oxidation stability of these products are excellent, thus the physical characteristics
of Red Line MTL and MT-90 will change little with use.
MTL
This 70W80 GL-4 Gear Oil (SAE 5W30/10W30 engine oil viscosity) is designed for use in manual transmissions and transaxles.
Provides excellent protection of gears and synchronizers and its balanced slipperiness provides a perfect coefficient of friction,
allowing easier shifting. Popular in many BMW transmissions and in most Honda and Acura transaxle applications.
MTL is the correct product for Big-Twin primary chaincase. Big-Twin transmissions should use Red Line Heavy Shockproof, while
Sportster and Buell Tranmission should use Red Line 75W90 GL-5 gear oil.
MT-90
Popular in Nissan, Toyota and Mazda manual transmissions and transaxles as well as other selected applications, this is a 75W90 GL-4
Gear Oil that’s slightly heavier than MTL. Provides excellent protection of gears and synchronizers and its balanced slipperiness
provides a perfect coefficient of friction, allowing easier shifting.
75W90 NS
This GL-5-type geal oil doesn't contain the friction modifiers for limited-slip hypoid differentials. This makes the transmission
synchronizers come to equal speeds more quickly, allowing faster shifting and much easier low-temperature shifting. Can also be
used in racing limited-slip differentials where weak spring design causes too much wheel spin.
75W140NS
A heavier product what works well over a wide range of loads and temperatures, This GL-5-type geal oil doesn't contain the friction
modifiers for limited-slip hypoid differentials. This makes the transmission synchronizers come to equal speeds more quickly,
allowing faster shifting and much easier low-temperature shifting. Can also be used in racing limited-slip differentials where weak
spring design causes too much wheel spin.
Automatic Transmission Fluid
Red Line Synthetic Automatic Transmission Fluids are designed to provide excellent low-temperature shiftability and improved thermal
stability. The products identified as Synthetic ATF, Synthetic D4 ATF, and Synthetic C+ ATF have better thermal stability and lower
volatility characteristics than a petroleum ATF and provides a much lower viscosity at lower temperatures, providing much quicker
shifting in cold weather. The balanced frictional characteristics provides smooth and consistent shifts for extended drain intervals.
The superior stability compared to petroleum ATFs allows high-temperature operation without varnishing valves and clutches which leads
to transmission failure.
D6 ATF
Recommended where the latest Dexron-VI is required, as well as where Ford Mercon SP, Toyota WS and Mercedes Benz NAG-2 fluids are
specified, Red Line D6 ATF satisfies the requirements for many of the latest automatic transmissions that require consistent,
low-viscosity fluids that are shear-stable. It provides the best low-temperature shiftability in automatic and manual transmissions
which require ATFs. Also satisfies API 70W/75W GL-4 gear requirements
• Most shear stable for consistent operation
• Excellent low-temperature shiftability
Synthetic ATF
This product is an approved GM Dexron II, Ford Mercon, and Mercedes Benz Automatic Transmission Fluid and is suitable for GM, late model
Ford, or any vehicle which recommends Dexron IID or Dexron IIE or Mercon for refill. Superior stability allows high-temperature operation
without varnishing valves and clutches. Also provides improved shifting in cold weather.
D4 ATF
Our most popular and versatile ATF, D4 is suitable for use where Dexron III, Dexron II, or Mercon fluids are recommended. D4 ATF is a
fully-synthetic product designed to satisfy the improved low-temperature requirements which will be in the new Dexron IV specification,
and the improved shear-stability requirements which will be part of the new Mercon specifications. D4 ATF also provides a GL-4 level of
gear protection, making it a superior product for transmissions and transaxles like the Corvette's T-56. The balanced frictional
characteristics provide smooth and consistent shifts for extended drain intervals. The superior stability compared to petroleum ATFs
allows high-temperature operation without varnishing valves and clutches which leads to transmission failure. It’s stability allows
high-temperature operation without varnishing valves and clutches. Also provides improved shifting in cold weather.
Racing ATF
Designed for use in racing automatic transmissions which need the positive shift of a Type-F automatic transmission fluid, Racing ATF
contains no slipperiness additives, producing faster shifts and quicker lock-up, and can reduce elapsed time in drag racing. A higher
viscosity compared to conventional Type-F transmission fluids provides higher torque converter efficiency at higher temperatures and
the enhanced extreme-pressure protection provides five-times better film strength when compared to petroleum ATFs, reducing gear and
clutch wear considerably. This product can also be used in manual transmissions which require ATFs, providing better gear wear and better
shiftability, but Red Line MTL® will provide even better wear protection and shift action.
C+ ATF
Satisfies the performance requirements of Chrysler Types 7176 and ATF+4 (Type 9602), while providing 30% greater operating viscosity,
1/3 the evaporation of petroleum ATFs, and improved oxidation and sludge protection. Red Line C+ ATF provides the exact frictional
characteristics required in the Type 7176 specification, providing proper shift feel and proper lockup torque converter operation.
The use of an improper fluid could cause torque converter shudder or harsh shifting. Red Line C+ ATF also provides the best low-temperature
shiftability in automatic transmissions allowing proper shifting at extremely low temperatures and will flow down to temperatures as low
as -60°C. The improved wear protection makes C+ ATF the perfect automatic transmission or transaxle fluid for Chrysler vehicles.
High-Temp ATF
Perfect for heavily-loaded vehicles, this is a synthetic ATF which is a GL-4 gear oil for use where Dexron III or Mercon is recommended.
Superior stability allows high-temperature operation without varnishing valves and clutches. Synthetic High-Temp ATF provides the gear
protection of a GL-4 gear oil in an ATF and provides a higher viscosity at higher operating temperatures, allowing the transmission to
operate at 70°F higher temperature and still provide the optimal shiftability and improved torque converter efficiency. The evaporation
characteristics are significantly improved, being twice as good as our Synthetic ATF and five-times better than a petroleum ATF. The
improved thermal stability significantly reduces the rapid evaporation of the ATF which can produce a frothing out the filler tube. The
balanced frictional characteristics provides smooth and consistent shifts for extended drain intervals. The superior stability compared
to petroleum ATFs allows high-temperature operation without varnishing valves and clutches which leads to transmission failure. This product
can be used in manual transmissions which require ATFs and will provide much better gear protection than a petroleum ATF; however, MTL®
will provide better wear protection and better low-temperature shiftability in most manual transmissions which call for an ATF. High-Temp
ATF is suitable for use in automatic and manual transmissions and transaxles where Dexron III, Dexron II or Mercon is recommended.