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Can someone verify if my pinion angle diagram is correct?

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Old 06-09-2008, 12:50 PM
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Question Can someone verify if my pinion angle diagram is correct?

Hi guys,

I put together a pinion angle diagram for a howto a while back, and now that I'm resetting my pinion angle, I'm second-guessing myself:



Is that method correct?

Thanks
Old 06-09-2008, 02:24 PM
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Trax, we use a different method of measuring pinion angle. We take measurement at the rearend or torque arm bracket if it has one, then at the rear of the drive shaft. We have a video on our site about the proper way to do this. I'll post a link to it, if you have any questions please give us a call. Our tech dept. is open MON-FRI 8:30AM-6:00PM EST.

http://www.bmrtvonline.com/video_detail.php?mId=3788
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Old 06-09-2008, 02:36 PM
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I don't like it,'our' pinion angle is only that of the relationship between the driveshaft and pinion because aftermarket torque arms generally have some degree of adjustability.The angle at the transmission output shaft and the driveshaft is 'nonadjustable'?,but is affected by changes of the pinion angle at the pinion.
We strive for -1 1/2 to -2 degrees difference at the rearend with the pinion pointing downward as compared to if perfect alignment existed at +-0 degrees.
Old 06-09-2008, 08:55 PM
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Yeah, but what pinion angle is the diagram depicting???? Is his figure correct?
Old 06-10-2008, 01:43 AM
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Originally Posted by tatasta
Yeah, but what pinion angle is the diagram depicting???? Is his figure correct?
The figure is correct but the math is NOT. It should be:

-4 - (-2) = -2

The tailshaft is pointing down to the right and the pinion is pointing up to the left--so they both have a negative slope. The pinion is 2 degrees less negative than the output shaft of the transmission.



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