Question about 1989 Jeep Cherokee

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89 Jeep Cherokee Pioneer w/AT4 auto tranny behind 4.0 engine. When cold, tranny works fine, but after 2 to 4 miles, won't engage in any gear manually or automatically, and won't engage in 4WD. After sitting overnight - will engage fine, then start slipping again... ATF appears OK, fluid levels OK, no smell or noise or problem w/tranny in past. Engine revs fine - starts OK, no apparant engine problems. sometimes if rev'd excessively (4k rpm) will get enough engagement to move a few feet. No warning of any problem - sudden onset. All linkage appears intact.

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  • Jeep Master
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This sounds like all checks have been done, the oil is fine and the linkage is good, soory to say your trany is in need of a rebuild, sounds like in internal leak or weak pump, i would have a trany shop check it but i can tell you there going to say it news rebuilding. good luck.

Posted on Nov 07, 2010

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2005 jeep grand cherokee laredo transmission shifting problems


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if the TCM sees bad inputs it will tell you, SCAN IT.

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93 Jeep Grand Cherokee only revs when put in gear.


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first: check if the shift cable is in position, cick down cable too..
-next: check if the torque converter is connected to the engine.
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- if tranny is open, check for metal pieces or clutch material in the oil pan and the filter unit. If you find more than usual, replace the transmission.

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discovered a service bulletin on my Jeep on "Alldata.com", which indicated "A/T - Throttle Position Sensor".I don't subscribe to the site, so I could only see this header. I thendid a search on Throttle Position Sensor and found a number of sitesthat described numerous transmission problems attributed to this sensor.I tookthe Jeep to a Chrysler dealer near me, and purchased the part for$69.00. I installed it myself, and the Jeep shifts beautifully, betterthan when I bought it.

A. The TSB you are refering to is number ATRATB324A, dated 1/1/1996 witrh the subject "A/T - AW4 Throttle Position Sensor (TP)".
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If the transmission works fine after the TPS is replaced then I would only recommend thata routine flush be done to it and perhaps treat it to a new filter.

http://autorepair.about.com/library/faqs/bl070g.htm

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