Red Line Synthetic Gear Oil is designed to provide the highest
degree of protection and greatest efficiency for your drivetrain.
Red Line provides a complete line of drivetrain lubricants which
are optimized for differential, transmission, or transaxle use over
a wide range of temperatures. Proper selection depends upon the
manufacturers requirements and whether the application is for
passenger automotive, commercial, or racing use. Red Line Gear Oils
contain polyol ester basestocks to provide excellent lubrication
even under extreme conditions of high-loading and high-
temperaturestheir natural lubricity provide excellent slipperiness
which reduces the sliding friction in hypoid gears to reduce wear
and temperatures. The synthetic basestocks have a natural
multigrade property, so large amounts of unstable thickeners are
not required to manufacture our gear oils, which means that Red
Line Gear Oils will provide a stable viscosity for even extended
periods of use. Red Line also manufactures gear oils which can be
used in limited-slip differentials without the use of additional
friction modifiers.
75W90
Our most popular gear oil, this is the preferred product in nearly
all car and light truck differentials, both conventional and
limited-slip. 75W90 is preferred for most racing applications. It
contains friction modifier which is recommended for limited-slip
units. 75W90 Gear Oil can be used in many transmissions and
transaxles; however, other Red Line lubricants have better
frictional properties for rapid synchronization. Exceeds
API GL-5.
75W140
Our 75W140 gear oil is a GL-5 rated product
recommended for street-driven road car differentials where that
viscosity is specified, providing excellent performance in both
conventional and limited slip units. Popular in late-model Ford
truck rear differentials as well as many other common models.
80W140
Generally used in commercial trucks which will climb long, steep
grades and some racing applications where power is not critical.
Generally 0.5% less efficient than 75W90. Can also be used in
differentials and transmissions where excessive noise is a problem
and limited-slip differentials which vibrate excessively when
turning a corner. Exceeds API GL-5.
75W90 NS
This GL-5-type geal oil doesnt 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 doesnt 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.
SuperLight Gear Oil
A friction-modified gear oil designed for use where 75W75
GL-5 gear oil is recommended (may be too slippery for
some syncros). Used in many motorcycle applications as an
alternative to ShockProof types. It has excellent low-temperature
flow which allows easier shifting when cold and good synchro
compatibility. May be used to obtain maximum power transfer in
racing differentials which do not see high temperatures.
LightWeight Gear Oil
A friction-modified gear oil designed for use where 75W80
GL-5 gear oil is recommended (may be too slippery for
some syncros). Used in many motorcycle applications as an
alternative to ShockProof types. It has excellent low-temperature
flow which allows easier shifting when cold and good synchro
compatibility. May be used to obtain maximum power transfer in
racing differentials which do not see high temperatures.
Limited Slip Friction Modifier
Compatible with petroluem or synthetic gear oils, this product will
significantly reduce the friction break-in of differentials,
reducing break-in temps for as much as 50 degrees F. Limited slip
or positraction units will often chatter without use of this
product or a gear oil with a similar modifier, so add only enough
to eliminate the chatter and avoid making the plates or clutches
too slippery.
