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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: 440349" data-attributes="member: 21229"><p>here is the 15min job test. for 4wd.</p><p>if this passes so will driving if the front of transfer case mode valve is not dead. or hoes bad or connected wrong.</p><p>in 1min work I see the diaphragm is not cracked, (std.leak down test all techs know)</p><p>then apply 15"Hg vacuum to inboard nibble right tire off the ground and i spin the tire and hear the forks lamp the coupling in 4wd lock (clank)_</p><p>and the pinion spins. now.</p><p>easy 15min work.</p><p>next key on the cluster center of dash not drivers cluster. left side lamp glows 4WD, key on or running.(tranny 5speed in neutral.</p><p></p><p>the test 4wd if fails the transfer case valve in front of it is dead. or 4wd is dead in the transfer case deep.</p><p></p><p></p><p>my video.</p><p><a href="https://drive.proton.me/urls/KFWCSPBZTR#O5lCke6ww1af" target="_blank">front axle 4wd testing</a></p></blockquote><p></p>
[QUOTE="deadpool1, post: 440349, member: 21229"] here is the 15min job test. for 4wd. if this passes so will driving if the front of transfer case mode valve is not dead. or hoes bad or connected wrong. in 1min work I see the diaphragm is not cracked, (std.leak down test all techs know) then apply 15"Hg vacuum to inboard nibble right tire off the ground and i spin the tire and hear the forks lamp the coupling in 4wd lock (clank)_ and the pinion spins. now. easy 15min work. next key on the cluster center of dash not drivers cluster. left side lamp glows 4WD, key on or running.(tranny 5speed in neutral. the test 4wd if fails the transfer case valve in front of it is dead. or 4wd is dead in the transfer case deep. my video. [URL='https://drive.proton.me/urls/KFWCSPBZTR#O5lCke6ww1af']front axle 4wd testing[/URL] [/QUOTE]
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Forums
Jeep Wrangler YJ
YJ General Discussion
4WD stopped working on 1987 YJ
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