Thread: 47-55.1 Drive Line Placement
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Old 11-30-2018, 06:19 PM   #17
dsraven
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Join Date: Nov 2010
Location: calgary alberta
Posts: 7,835
Re: Drive Line Placement

the angle of your green line needs to be the same viewed from the top, front and rear. just like the up and down angle would need to be the same, viewed from the side, front and rear. it's a different way of saying the same thing. ujoints don't care how they are situated in a frame or drive system, they just need to be paired with another ujoint with equal but opposite angle.front and rear angles need to match in order for the ujoints to cancel each others speed variations as they rotate. that is one reason why a lifted 4x4 will have more chance of having a driveline vibration if it has a 2 piece driveshaft. because the middle ujoint doesn't have a partner to be equal but opposite to. in the one link it will talk about this scenario and how it can be partially rectified by taking the one driveshaft out of phase (rotating the slip yoke).
if that doesn't confuse the crap outta you then you are just looking at the pics and not reading the dialogue, haha.

end of the day, use an angle finder to match the front ujoint with the rear ujoint from the side and top planes. equal but opposite angles. slot the mounts or whatever it takes
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