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Jeep Wrangler YJ
YJ General Discussion
95 YJ grinding noise - 2wd to 4h while moving
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<blockquote data-quote="machoheadgames" data-source="post: 441351" data-attributes="member: 18789"><p>I would think something is either up with the synchro in the transfer case or the vacuum actuated central axle disconnect on the front axle. </p><p></p><p>When you are in 2WD, the front driveshaft does not spin due to the CAD. As such, when you shift on the fly, the transfer case has to immediately get the front driveshaft up to speed, which it uses a brass synchro for just like a manual transmission. After that, the front/central axle disconnect vacuum motor receives vacuum and moves a fork over to engage the right side axle shaft. </p><p></p><p>My guess is the grinding might be from a bad transfer case synchro, but I don’t really know for sure. It could be grinding from something in the front axle. Maybe the fork isn’t engaging properly.</p></blockquote><p></p>
[QUOTE="machoheadgames, post: 441351, member: 18789"] I would think something is either up with the synchro in the transfer case or the vacuum actuated central axle disconnect on the front axle. When you are in 2WD, the front driveshaft does not spin due to the CAD. As such, when you shift on the fly, the transfer case has to immediately get the front driveshaft up to speed, which it uses a brass synchro for just like a manual transmission. After that, the front/central axle disconnect vacuum motor receives vacuum and moves a fork over to engage the right side axle shaft. My guess is the grinding might be from a bad transfer case synchro, but I don’t really know for sure. It could be grinding from something in the front axle. Maybe the fork isn’t engaging properly. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
95 YJ grinding noise - 2wd to 4h while moving
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