After doing extensive research this is what I’ve seen inregards to a two piece driveshaft. First drive shaft should be treated as an extension of the transmission output. Since the first drive shaft doesn’t have a corresponding u-joint to counter you must run it with a very low working angle(i.e. .5 degrees) the second drive shaft both the universal at the slip jointand at the rear end should have a working angle between .5 and 3 degrees and since the universal at the slip joint is cancelled by the universal at the rearend, they must be within 1 degree of each other.
After taking time and fully mapping the driveline angle I can see how me lowering it and not moving the carrier bearing upwards has created some angles not conducive to a proper driveline. What surprised me was that the working angle of the first universal exceeded the limits that Ford prescribed, mine has a working angle of 4 degrees (and this was unaltered from Ford). Reading that the Raptor transmission mount cures some vehicles driveline shudder, I would suspect that it may be a little taller and actually corrects the driveline angle.
I’m going to raise the carrier this weekend, then remeasure driveline angles and correct as needed, I’m fully confident that I can correct and in fact make better than what Ford initially set up.
Last edited by Thoas Lindemann; 12-18-2014 at 11:09 AM.