Thread: driveshaft angle from trans to rear

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I set the car on the ground - or at least mock it up at ride height, with the pinion yoke set at 0*. Then I measure the down angle at the transmission yoke, and bring the nose of the pinion yoke up until I have the same angle.

If you really want to dial it in, measure the angle between the output shaft of the trans and the driveshaft, then between the driveshaft and the input shaft of the pinion. Both angles should be equal, and between one and three degrees.

It's important to have the angles equal because U-joints are not constant velocity. They actually slow down and speed up as they rotate. Making the angles equal causes them to change velocity at the same time and it eliminates vibration. If the angles are unequal, you're looking for trouble, vibration and wear.

Take a look at this: http://www.iedls.com/ptsetup.html