How to measure pinion angle?

[mrtleavitt]

Hey guys, I'm starting to think my vibration is coming from an incorrect pinion angle.

1. How can I measure the pinion angle?

2. Is there a tool someone knows of or would it be better to take it to a shop to have them check it? (I'd prefer to check it myself since the closest city is an hour away)

[averagef250]

http://www.amazon.com/Starrett-490-12-4 ... B000KU81RY

You need a precision bubble protractor like this. The plastic welder magnetic stick on deals do not suffice.

[BobbyFord]

Set the tool against the pinion yoke where the u-joint straps bolt on. 4-5 degrees is good. The pinion angle should mirror the driveline angle.