Pinion Angle, vibration, confirm my thinking

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67Dart273 said:
They are SUPPOSED to be ALMOST parallel. Only reason its recommended "down" from parallel is that it will run OK at 2 or so under light (cruise) loads. Under WOT, it's "estimated" that the pinion will wrap up to "nearly parallel."

What they are NOT supposed to be is "in the same plane." That is, aligned not only parallel but forming one single straight line, IE both joints operating at zero angle

A little reading from Dana / Spicer

http://www2.dana.com/pdf/J3311-1-DSSP.pdf
Click to expand...

Yah, what he ALMOST said! (((Disclaimer = the word ALMOST in bold type in the above "quoted" post was not included in the poster's original response))) Remember, if you are starting at parallel, then under normal acceleration load, the angles are going to be off. With correctly adjusted Caltracs, they should only allow about 2+ degrees of axle wrap.
 
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