Then your pinion should 1 degree up when the rear end in under a load (acceleration), which is usually around 2 degrees down in the static position. Under normal circumstances the pinion will rise about 3 degrees when you stomp on it depending on your rear suspension (leaf, 4 link, traction bars). But keep in mind that the static pinion angle (2 degrees down) is based on standard leaf spring car. If you limit the upward rotation of the pinion with traction bars then the angle changes. In the end if the pinion angle is parallel to the engine drive line when the rear end in under a load it should be OK>
