[psiperformance]

The only problem with this is it lowers the effectivness of the clutch pack ..

What the friction modifier does is let the clutches slip against each other easier so you get less torque bias in the rear end.

The groan is the clutchs trying to do thier job .. your hearing them slip on each other because they are trying to grab.

adding the extra modifier makes them slip much easier so no groan