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Try JCWHITNEY.COM they have manuals that might show them. It took me quite a while to finally figure out the vacuum diagram for the '87 Wrangler front axle system. If I can help, please contact me at ftretta@msn.com. My 91 Wrangler has same vacuum system and they are prone to problems. As long as your transfer case is shifting into 4WD (mine is), a better solution is a manual cable that replaces the funky vacumm motor on the front axel. It seems a bit pricy (around $200 if I remember correctly), but since I have already replaced the motor once several years ago, rather than spend the money to fix the now broken again funky set up, I think better money is on a cable to eliminate that weakness. I have seen several aftermarket suppliers carry it. Amazon or EBay might also be good sources.

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โˆ™ 2008-04-19 00:16:53
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Q: Where can you find the 4 wheel drive vacuum schematic for an 87 Jeep Wrangler?
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