[Fordestes]

Check to see if the driveline shop got the u-joint cap eyes in a perfect alignment or (shaft could be damaged or twisted) on the tube, if not aligned this is an out of phase condition ,being out of phase will cause what is known as a secondary order vibration, if there are multiple drive shafts or a slip yoke they must be phased or timed centers with the u-joint caps aligned horizontally to avoid each shaft or yoke binding against one another. if all is in order rather than try to explain how to calculate the working angle, use of the Spicer calculator will be easier, If you don't have an inclinometer ( another word for a fancy type protractor), get a cheap school supply protractor with a center hole on the flat surface and tie an 8" string through the hole and tie a small weight on the other end ( I use a 5/16 nut ) place the flat side of the protractor against the drive line tube bottom side and read the degrees where the string lays across the numbers, record the reading, then use the same method to measure the pinion yoke, in the event the protractor wont clear the yoke ,grab a deep socket and place it vertically flat against the u-joint trunnion/ bearing cap surface as to extend the bearing cap surface , sometimes the bearing retainer clip will need to be removed in order to have a flat surface ,then read the protractor and record , do the same with the front transmission u-joint, this will give you the numbers to plug into the calculator .