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Old 02-05-2006, 10:31 AM
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confused pinion angle

The more I read the more confused I get.Maybe old age.I have a 53 F-100.After about 3000 miles it started making a noise like a universal was bad.After checking the rear end I looked at the universal.The 2 shafts that the U bolts hold on the rear were bad.Had grease in them and no needles missing but had grooves in them(shafts).My trans is 5 degrees down and pinion is 5 degrees up.Do you guys think that is a problem? If not I would appreciate your input.Thanks .......Lash

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Old 02-05-2006, 10:54 AM
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To clarify your 5 degrees down/ 5 degrees up. Are the centerlines of the trans output shaft and the pinion shaft in the rear end parallel or within 2 degrees of each other? If the operating angles are under 3 or 4 degrees the u-joint should have a normal life expectancy.. I would look at the bearing cap on the u-joint to see if it was too tight in the yoke. Or possibly there was the wrong grease or not enough grease. Now if the angles are opposite of each by 10 degrees or your truck is lowered or lifted alot and it puts the u-joint operating angles greater than 5 or 6 degrees max then you have a problem. In any event you should no more than what is specified in the chart on this site here
http://www.drivetrain.com/driveline_angle_problem.html. Hope this helps, mikey
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Old 02-05-2006, 04:21 PM
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Here's another thread that explains how to determine correct pinion angle.
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