To measure it, you will need an angle finder that has a 360degree face and uses gravity to pull the needle. These usually come with a magnetic base and are about 3-4" in diameter.

Craftsman Magnetic Universal Protractor
http://www.sears.com/sr/javasr/produ...id=00939840000

1. Place angle finder on bottom of driveshaft and write down the reading.See attached diagram below.