This is not a debate on pinion angle but with help from the guys on here mine is fixed and some say up some say down. Sometimes I create problems trying to figure out why they work like they do. Here is my question and some of it may not mean anything but someone may can answer it. The vibration trouble was when my pinion was up. My trans at the bottom of the yoke to the floor is 6.0" rear at the bottom of the yoke is 8.500" pinion is down 2 1/2 degrees trans is down about 4 degrees if I put a gage on the drive shaft it pointing down 5 dose this even sound like it would work like it should? I don't have any problems just wandering.