Originally Posted by Rusty

The stock VLSD. Once it gets hot. It starts to act like an open diff. That's the why of diff coolers. After a while with repeated abuse from the track. The VLSD just fades away and doesn't come back. It becomes a one wheel peeler.

The gear driven LSD's are great until you lift an inside tire in a corner. Then all of the power goes to the lifted tire. Use any gear lube you like. Doesn't need the LSD additive.

The clutch type LSD, OS Giken and others. If you lift an inside tire. They will still send power to both tires. They are tune-able. 1, 1.5, and 2 Way. Plus percent of lock-up. You have to know what you are doing! But you have to drop the diff and pull the LSD to open it up and change things around. The Giken takes it'sown gear lube which is $70.00 per liter. And you need 2 liters. If you have a diff cooler. Then it's 3.5 liters. $$$$ The clutch type LSD's are more money too.