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2nd Generation
TRACTION and OR LONG BAR set up
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<blockquote data-quote="throttle jockey" data-source="post: 14200677" data-attributes="member: 54243"><p>Shackles by themselves won't affect pinion angle enough to warrant shims but you can measure just to be sure. It takes seconds to determine pinion angle, you'll spend longer jacking up the truck.</p><p></p><p>0 to -5* is acceptable pinion angle.</p><p>-3.9* is stock.</p><p>-1* is great for DD'ing.</p><p>-2* is great for racing due to the additional axle wrap during hard launches.</p><p></p><p>Negative pinion angle refers to the snout of the differential pointing towards the ground and is important because as the axle rolls during acceleration the snout rotates towards the bed of the truck, nearing (or exceeding) 0*. </p><p></p><p>Positive pinion angle refer to the sount of the differential pointing towards the underside of the bed... no good since the angle gets more severe during acceleration.</p><p></p><p>On the other end of the drive shaft the output shaft angle is of equal importance and is measured using the same method used to measure pinion angle. The pinion angle and output shaft angles should basically be the same, the only difference being that the pinion angle should be negative whereas the output shaft angle should be positive (ex. -3* pinion angle and a +3* output shaft angle).</p></blockquote><p></p>
[QUOTE="throttle jockey, post: 14200677, member: 54243"] Shackles by themselves won't affect pinion angle enough to warrant shims but you can measure just to be sure. It takes seconds to determine pinion angle, you'll spend longer jacking up the truck. 0 to -5* is acceptable pinion angle. -3.9* is stock. -1* is great for DD'ing. -2* is great for racing due to the additional axle wrap during hard launches. Negative pinion angle refers to the snout of the differential pointing towards the ground and is important because as the axle rolls during acceleration the snout rotates towards the bed of the truck, nearing (or exceeding) 0*. Positive pinion angle refer to the sount of the differential pointing towards the underside of the bed... no good since the angle gets more severe during acceleration. On the other end of the drive shaft the output shaft angle is of equal importance and is measured using the same method used to measure pinion angle. The pinion angle and output shaft angles should basically be the same, the only difference being that the pinion angle should be negative whereas the output shaft angle should be positive (ex. -3* pinion angle and a +3* output shaft angle). [/QUOTE]
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TRACTION and OR LONG BAR set up
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