Question about Jeep Grand Cherokee
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Posted on Jan 02, 2017
Not sure why you disconnected the battery to replace plugs, but try locking and unlocking the drivers door using the key. That should re-set the security system.
Posted on Feb 28, 2010
SOURCE: 93 jeep grand Cherokee with
Are your try cleaning the NSS (Neutral Safety Switch). Your fluid levesl are OK? Keep in mind that when the transmission overheats, the TCM shutsdown the OVERDRIVE to reduce the heat in the transmission. First thing I would do... is check the tranny fluid level. Then, maybe have the fluid and filter changed along with a flushing.
Is it never going into overdrive, or is it slipping out of overdrive? If it never goes, then it might be as suggested above. Whereas if it slips out of overdrive... could be another transmission solenoid (rare) or some adjust request. Sounds like the TCM or the Temperature Sensor is failed (included Thermostat).
Additionally, I quote other interesting commets:
After trying everything I could think of, I noticed that when the automatic locks failed to engage (at around 15mph) that's when the transmission would not shift into OD. So, now when the locks don't lock and the transmission doesn't shift to OD, I put the transmission in neutral and turn off the ignition and let it coast to a slow speed (see above caution). When I start the engine again and put the transmission back into drive, the locks engage and so does the OD. Works for me. I'm currently doing research on what causes the locks to engage automatically. I'm thinking it will be a vacum or a switch.
Hope this helps. Keep us updated.
Posted on Jun 17, 2011
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