No... I get the working angle mechanics. I have built a few hundred drive shafts in my time. I stop doing the math long ago (and its shows)... right about the time of commercial lasers. That... is obvious, from the math above. It should read -3 vice that of -4.
Anyway... semantics.
What is actually more important here is that 'we' are missing the prop shaft angle measurement from Pilot20. Without that specific bit of information... we are pretty much grasping at straws to ultimately provide a correct asessment.
With the power train at -4.5*... and the pinion at +4.5*... this is merely thought of as good... as you can only go so far in suspension travel to actually worry about the propshaft angle. Normally... having equal and opposite will suffice for a street driven chassis. Although... if we had the propshaft angle... and specific ride height information... we could actually provide direction with the emperical data from just that.
Working Angle Calculation:
1. If both angles are upward, subtract the smaller angle from the larger angle to obtain the working angle.
2. If both angles are downward, subtract the smaller angle from the larger angle to obtain the working angle.
3. If one angle is upward and the other angle is downward, add the two angles together to obtain the working angle.
Not subtract.
I gave up on the hit and miss, manual angle theory since the introduction of "True Laser Alignment's" driveline tool. I fell it's better to do thing right the first time... and gain the 12-18 HP from doing it right.
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