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2002 Jeep Grand Cherokee
11-18-2007, 11:45 AM
Post: #1
2002 Jeep Grand Cherokee
My 2002 Jeep Cherokee with 4.0 I6 has problems shifting from 1 or 2 gear into drive.  Must achieve between 3500 and 4500 RPM to shift into drive.  Once the tanny changes into drive, it will not change into passing gear or overdrive.  Just changed tranny filter and fluid a month ago and did not fix the issue.  Any suggestions would be appreciate.

Thanks in advance,
Earl
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11-18-2007, 07:34 PM
Post: #2
RE: 2002 Jeep Grand Cherokee
Is the check engine light on? There is a governor sensor and solenoid in the trans. That sounds like the problem. Normally it sets the engine light. They are easy to replace. Let me know about the light. If it is on, have the codes checked.

Cary Joe York
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11-18-2007, 07:38 PM
Post: #3
RE: 2002 Jeep Grand Cherokee
Here is a picture of the valve body and sensor.


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.gif  101571651.gif (Size: 16.97 KB / Downloads: 26)

Cary Joe York
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11-25-2007, 12:46 PM
Post: #4
RE: 2002 Jeep Grand Cherokee
Thanks for the reply. The check engine light is not on. Sometime the tranny can be manually shifted from 1st to 2nd to drive, however other times it won't work either. The O/D button gives no response. Not sure if I am running in overdrive or drive, and have no passing gear.

Thanks again,
Earl
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11-25-2007, 01:24 PM (This post was last modified: 11-25-2007 01:25 PM by Rupe.)
Post: #5
RE: 2002 Jeep Grand Cherokee
I'd suggest you go back and look at the easy stuff again just to make sure you haven't over looked something that's too obvious. Check all of the fuses (with a test light) and all related harness plugs for something that might have come loose. Same goes for vac hoses. The tranny may think your foot is on the floor due to a low vac reading somewhere. (delayed up-shift and no OD shift are typical symptoms)

Next make a call to the dealer and see if there's any service bulletins on that particular model. I do recall one relating to an under dash harness on a 2002 Jeep Liberty so maybe there's a quick / cheap fix for you too.

Lastly, don't be affraid to take a ride to a local trany shop and ask for an opinion. Most will offer free advice. (even if that results in the advice that a tear-down might be in your future)

BTW, there could be a trouble code stored even if the dash light is not on at the moment.

Rupe
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11-26-2007, 01:56 PM
Post: #6
RE: 2002 Jeep Grand Cherokee
Yea, If the O/D button is inop. I would check all fuses and scan the PCM for codes.

Cary Joe York
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