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Here's a great thread = I'm almost at the 'rebuild' stage myself...last Jeep I'll ever own. I'm sticking with my CRV from here on out! http://www.jeepsunlimited.com/forums/showthread.php?t=872990 You could have a bad throtle position sensor(all shifts), a bad seal in the transmission(2-3 shift), or the front band could be out of adjustment(1-2 shift).

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Q: What could cause Up shift problems with a jeep 42RE transmission?
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