Rich --
You're working too much on the angles of the tail shaft vs the pinion angle -- and missing the important steps that are critical.
So --- lets see if I can write this so you can understand.
Engine DOWN 4* -- Driveline DOWN 2*'s -- that "angle" is 4 - 2 = 2* angle
Pinion down 2* - driveline DOWN 1* - that angle is 2 - 1 =1* angle
The one angle is 2* -- minus the other angle of 1* equals the DIFFERENCE is 1*
which would be fine. And this difference can be MAX of 3* (really depends on drive line speeds less for high speed and more for low speed).
So it really doesn't matter what the down angle of the engine is -- or the pinion angle is -- but they MUST relate to each other measuring the angles to get the driveline angle...
Does this make sense?
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