As Shiloh pointed out to many people overlook the front end and just how tight many of them are. Not talking about the shocks them selves per se' just the suspension in general. As for the rear shock keep tightening the extension til it spins Soften the rebound as much as it will tolerate as well for now. Generally speaking the extension controls the hit or plant of the tire and the rebound how well or long it plants the tire..

With the numbers you are talking are you referring to how far from stiff or from soft they are?? Just to clarify