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Jeep Wrangler YJ
YJ General Discussion
4WD stopped working on 1987 YJ
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<blockquote data-quote="deadpool1" data-source="post: 440351" data-attributes="member: 21229"><p>Key off test.</p><p>on mine I used the vacuum tool, on both nipples</p><p>and spin the tire.</p><p>and I had to spin it or the Vacuum motor stalls. and after applying hand pump vacuum there as I spin it you hear a loud clunk. (at that location)</p><p>do it to both nipples 1 at a time and spin it, it must clunk both ways or the motor is bad or the fork is jammed.</p><p>the axles are spline'd and must index and if not it jams. so the tires must turn even the most slow amount to get the lock to move.</p><p>the forks must not be dry ever. 5oz lube in the fork box.</p></blockquote><p></p>
[QUOTE="deadpool1, post: 440351, member: 21229"] Key off test. on mine I used the vacuum tool, on both nipples and spin the tire. and I had to spin it or the Vacuum motor stalls. and after applying hand pump vacuum there as I spin it you hear a loud clunk. (at that location) do it to both nipples 1 at a time and spin it, it must clunk both ways or the motor is bad or the fork is jammed. the axles are spline'd and must index and if not it jams. so the tires must turn even the most slow amount to get the lock to move. the forks must not be dry ever. 5oz lube in the fork box. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
4WD stopped working on 1987 YJ
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