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Old 07-09-2021, 08:04 AM
MAStuart MAStuart is offline
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Join Date: Mar 2009
Location: Mendota, IL
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The center line thru the crank and trans shaft need to be parallel with the pinion shaft. They need to be parallel within the working angle of the u joint. If everything is in a straight line the u joint will fail because the bearing in it will not rotate. It will then hammer the bearing out of the u joint. If the pinion angle can change because of anything other than a solid mounted rearend it should also have a small amount of down pinion angle. This is how they can offset the engine to one side or the other. Also the pinion is quite often not centered in the car or truck. Lots of diagrams on the net.
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