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    Front axle vacuum shift system

    1047838 I have a '90 Wrangler 4.2L and the front axle won't engage. The front driveshaft is powered when I shift into 4wd though. Most of the troubleshooting stuff for the front axle shift motor I've read refers to this unit as having 2 vacuum lines, but mine has three (two ports on the edge of...
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