Question about 1999 Jeep Grand Cherokee

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Replaced transmission seal then on 2 different occasions going down highway at bout 65 to 70 miles hour transmission kept shifting btween overdrive n drive come to a stop n take off didnt do it again fluid level fine 1999 jeep grand cherokee laredo v6

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Computer controlled transmissions can get confused at times, from my personal experience. If the problem doesn't happen again, I would ignore it. If it happens all the time, it's most likely the transmission computer. Other things could be the shift linkage, engine vacuum leak, speed sensor, etc... Hope this helps.

Posted on Sep 27, 2010

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Posted on Jan 02, 2017

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heres an idea to try
take out the transmission filter and replace with new one make sure to take not of any metal debry in trans pan this indicates the trans had sheered its gears down and a trans rebuild is needed
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The service light is a reminder for you to have the car serviced, it can be reset, and it will come on again in 5,000 miles or so.

The overdrive light may be caused by the wiring to the overdrive solenoid on the transmission, or the relay. Just be sure the wiring is ok before replacing the relay, or you can damage the new relay.

Bret
RepairPal.com

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