Driveline Vibration and Pinion Angle - 4x4

I'm looking at my driveline angles on my 4x4 1975 Ford Bronco. A couple years ago I put a 2.5" lift and 1 " suspension lift on my Bronco, and since then I've had a vibration coming from the rear of my Bronco.

These are the shims I installed: https://bit.ly/AxleShim

To check your driveline angles, use a digital protractor like this one: https://amzn.to/3ccQvXO

Let me explain how to check your pinion angle.

First, measure the angle of your drive shaft by putting the protractor on the driveshaft. This number will be from 0°. Then, remove the drive shaft and measure the angle of the differential by putting the protractor on the face of the differential yoke. This number will be from 90° (and this is your pinion angle). Then, subtract that number from 90 to get your angle. Last, subtract the differential angle from the driveshaft angle. These two numbers should be as close as possible but remember to account for about 4° of axle wrap on leaf sprung axles.

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Видео Driveline Vibration and Pinion Angle - 4x4 канала Nashville Early Bronco