its a 3 point mount, 2 motors and a trans. Someone once told me that if you ran solids, you have to run them everywhere so everything is tied in to the chassis/unibody/whatever. If you ran 1 on the torque side, that will eventually crack the ears or the mount as the motor is still going to flex on the rubber side and all that will be magnified via leverage onto the solid side. I have run solids on a warm Cleveland and didnt feel the vibes were all that bad. Whats the advantage besides not breaking the rubber over time? That is why machinery is on isolators even when bolted to the ground. What do they say about palm trees? They give a little and can weather a storm where as a rigid tree will break or fall over.