Question about 1996 Jeep Grand Cherokee

1 Answer

Wont shift down or go into overdrive

My jeep is staying in a high gear and wont SHIFT down or go into over drive! what could be causeing it do do that

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  • Dalton Higginbotham
    Dalton Higginbotham Mar 19, 2014

    i put an new tanny in it and its doing the same thang as the old one

  • Robert Rankin Mar 23, 2014

    To find out exactly where the modulator valve is located, I would reccommend you goint to your local parts store and asking them to print you a copy of the exploded diagram of the transmission and all its components. Aske them to point out the modulator valve for you.

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  • 341 Answers

I think that the modulator valve has failed. It isn't a tough fix. Get a new one and replace it and you should be okay.

Posted on Mar 19, 2014

Testimonial: "were is the modulator valve at"

  • ZJ Limited
    ZJ Limited Mar 19, 2014

    First I suggest to check transmission fluid levels. Some "check engine" light on dashboard?

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6 Suggested Answers

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Posted on Jan 02, 2017

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hi99ins
  • 123 Answers

SOURCE: overdrive Problem

inside the transmission...i doubt u could repair it yourself....

Posted on Jan 17, 2009

  • 2 Answers

SOURCE: 94 jeep grand cherokee will not shift into overdrive

My 97 Jeep Grand Cherokee was doing the same thing. I changed the TPS ( Throttle Position Sensor) Now it is great goes into overdrive fine. It is really easy to change.

Posted on Feb 11, 2009

Mikey108
  • 475 Answers

SOURCE: My 1989 Jeep with AW4 transmission does not downshift or ?

This model has a tranny computor under the dash on the right side screwed to the bottom of the dash. If I remember correctly, there is also an inline fuse attached to the harness. Check the fuse.

Posted on Feb 12, 2009

  • 6982 Answers

SOURCE: 02 jeep liberty won't shift into 3rd or 4th gear.

Ratio codes generally indicate a pressure loss & slipping which the computer reads as a gear ratio problem. Likely you need a rebuild.

Posted on Mar 16, 2009

  • 6982 Answers

SOURCE: 2000 jeep grand cherokee limited starts in 3rd gear

oil pressure problem should be checked independently of other problems...Use a good accurate mechanical gauge to check. If pressure is good (no less than 15psi at idle hot (I prefer to see at least 20) check dash grounding, block ground and if OK, change sending unit. Dash and body ground can influence operation of shift and body control modules so indirectly your problem may or may not be related, depending upon what you find while testing. And it could turn out to be a defective module! They are expensive and just plugging new ones in may work, but then again, it might not. I might be totally incorrect on this...that's the value of actually being there instead of doing this by "remote control".
If you read the numerous posts pertaining to all vehicles, you will see that you are not alone with electrical problems...As long as the engineers who design this stuff, keep using "modules" to replace ordinary simple and reliable systems, we will continue to have these problems. Do some testing and I'm sure you will find a solution! (I'm still waiting for someone to make a program for a PC that will give a complete readout of every system in a vehicle, including exact faults instead of general system "suggestions")
Good luck

Posted on Apr 07, 2009

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If the engine has a rough idle you know you have a miss-fire or other problem with one or more cylinders.
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Since you have a computer-controlled transmission, it would be better to ask the onboard computer that question....you will probably get a much more definitive answer.

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