magellan Posted January 10, 2010 Share Posted January 10, 2010 Yesterday, my '89 Comanche developed what I'll call a slight hiccup in the driveline. Occasionally, I can feel something slip slightly while cruising down the snow and ice covered road in 4-HI. I can think of two possible causes. The first is a stretched chain starting to slip in the NP231. I'd bet on this one because the truck has about 155K and I just had to rebuild our XJ NP231 at 165K. The second thing I'm wondering about is whether or not the front axle disconnect isn't engaging securely because of a broken shift fork. Would the '89 MJ have a steel or die-cast aluminum shift fork in the disconnect? We had a '92 YJ that used an aluminum shift fork. The fork broke in half and left us in 10" of snow with no power to the front wheels. Any thoughts? Thanks, Jerry Quote Link to comment Share on other sites More sharing options...
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