Redline Limited-Slip Diff Friction Modifier is an additive that helps to improve smoothness and reduce the clunkiness that is often experienced with Limited Slip Differentials (LSDs).
The plates or cutches within an LSD are required to allow the differential to lock-up properly, with lubricants often used to help reduce the clunkiness that these can cause. However, too much lubricant can cause the plates to slip, preventing the differential from locking reliably and consistently.
Redline Limited-Slip Diff Friction Modifier is to be added to your existing LSD oil if you're experiencing an umcomfortable amount of clunkiness. Gradually add the Friction Modifier to your LSD until the differential's action becomes smooth but while still locking reliably.