Technical Miller Inclinometer

[/IMG] I think I know what this does. Is it for measuring driveshaft alignment? I got this from a retired mechanic. He was not a car builder. Why would a mechanic need this?

 

in use... (notice this is a Mopar service manual image)

 

I suppose that he would use it to check angle after removing and reinstalling or replacing a rear housing. That would be the proper way, also to check if a rear moved in the u-bolts.

 

or just to diagnose a vibration complaint