Quote: You should have nose down on the diff so as you load it it goes to straight under full load... leaf spring cars need more due to wind up on the springs... if its a street car it requires less than a drag car, so about 5* for a street car and about 7* for a drag car
look at the video of the rear diff in action and you will see why.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
look at the video of the rear diff in action and you will see why. 
