driveshaft angles

92b said

When you set your pinion at 5 degrees, is that measured relative to the ground? If not what is the 5 degrees relative to?

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I've already answered this once. It's relative to the ground. I weld the perches on so the pinion center line is 5 degrees up relative to the ground. That is the ONE TIME when the ground is relevant. After that, it doesn't matter where the ground is, or if the car is flipped upside down, backwards or inside out, because from there you are measuring working angles of the u joints.