AMSOIL Slip-Lock™ Differential Additive
AMSOIL Slip Lock Differential Additive is formulated with advanced friction modifiers. Designed to eliminate
gear-housing chatter in cars, trucks and SUVs equipped with limited-slip, posi-traction and locking differentials.
Formulated for use with both synthetic and petroleum gear lubricants and safely replaces manufacturer-recommended
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Package sizes include:
4-oz. Bottles (case of 12)
When making a turn, the outer wheels of a vehicle must travel faster than the inner wheels. It is up to the
differential to act as a balance arm, establishing constant equilibrium of torques and forces between the left-hand
and right-hand driven wheels. In standard (or open) differentials, power is directed to the wheel offering the
least resistance. This works well when making a turn, but in a situation where one wheel is lifted off the ground,
it causes the suspended wheel to turn while the other remains motionless.
Limited-slip (or positraction) and locking differentials are traction-increasing devices. Locking differentials
transfer all available torque to both wheels. The teeth of the spider assembly engage with those on the locker
clutch, causing both axle shafts to operate as one. Locking differentials don't allow one drive wheel to spin while
the other remains stationary. Instead, they keep both wheels in drive mode, but unlock to permit different wheel
speeds when turning. The engaging and disengaging of the teeth on automatic locking differentials often causes a
banging and clunking sound. Manual locking differentials usually use an electric motor or vacuum diaphragm to
engage the locker, reducing this noise.
Limited-slip differentials allow different wheel speeds when turning, but when one wheel loses traction, greater
torque is transferred to the wheel offering more resistance. Limited-slip differentials make use of friction
between clutch plates, as opposed to the meshing teeth employed by locking differentials. Transferring less torque
per side, limited-slip differentials are generally smoother and quieter than locking differentials, but still
sometimes "chatter" when transferring torque to the wheel with traction.
In some differential applications, a friction modifier additive is necessary to reduce chatter. AMSOIL Slip-Lock
Differential Additive is formulated with advanced friction modifiers and is designed to eliminate gear-housing
chatter in cars, trucks and SUVs equipped with limited-slip, positraction and locking differentials. It also
reduces the banging and clunking associated with automatic locking differentials.
AMSOIL Slip-Lock Differential Additive is formulated for use with both synthetic and petroleum
gear lubricants and safely replaces manufacturer recommended friction modifiers. Its convenient flip-top dispenser
provides quick and easy application to the gear housing. One four-ounce bottle of Slip-Lock treats differential
capacities of two to four quarts. It is not for use in automatic transmissions or other applications requiring
NOTE: AMSOIL Synthetic Gear Lubes do not require the use of this additive. However, not all
differentials respond the same and if chatter is noticed, the addition of AMSOIL Slip-Lock will eliminate it. For
chattering differentials not running AMSOIL Gear Lube, this product is an excellent solution to the problem.