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Cobra Forums
2013-14 Shelby GT500
Rear end problems
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<blockquote data-quote="Beercules" data-source="post: 15295807" data-attributes="member: 156123"><p>Don't do hard launches and as long as the diff is set up right it should be ok. </p><p>When you launch the pinion deflects away from the ring gear a bit, and the launch forces on the gear teeth are enough to set up a second pattern. Either Strange or Currie told me this second pattern is what causes the whine. </p><p></p><p>The reason the 9" doesn't have this issue is because it has a 3rd pinion bearing that doesn't allow it to deflect away from the ring. </p><p></p><p>If you're nice to the diff and it starts to whine a bit after a gear change its probably due to the bearings 'wearing in' and loosening up. Needs reshimming and should be ok. Usually preload during initial setup takes the wear in into account and is set up tighter.</p></blockquote><p></p>
[QUOTE="Beercules, post: 15295807, member: 156123"] Don't do hard launches and as long as the diff is set up right it should be ok. When you launch the pinion deflects away from the ring gear a bit, and the launch forces on the gear teeth are enough to set up a second pattern. Either Strange or Currie told me this second pattern is what causes the whine. The reason the 9" doesn't have this issue is because it has a 3rd pinion bearing that doesn't allow it to deflect away from the ring. If you're nice to the diff and it starts to whine a bit after a gear change its probably due to the bearings 'wearing in' and loosening up. Needs reshimming and should be ok. Usually preload during initial setup takes the wear in into account and is set up tighter. [/QUOTE]
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2013-14 Shelby GT500
Rear end problems
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