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Old 07-11-2013, 05:23 PM
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transmission problem.

i have a 2004 grand cherokee special edition. last week i changed the transmission fluid and filters and it worked well for a couple of days but then it wont go over 40 mph and it feels like it wont shift into 3rd gear!! does any one know hw to solve this issue??
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Old 07-11-2013, 09:26 PM
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Re: transmission problem.

Welcome to the garage.
Since you said filters i presume you have the 4.7L with 5-45RFE transmission, right?
Did you check the transmission fluid level?
Does it shift from 1st to 2nd normally?
Do the keydance: ignition switch on/on three times and leave in on at the third time. The odometer will show DONE when all ok or a fault code.
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Old 07-12-2013, 04:27 PM
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Re: transmission problem.

thanks for responding. yes its a 45RFE and the fluid is just fine. i did the keydance and the ODOMETER showed DONE, no fault code??!
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Old 07-12-2013, 08:59 PM
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Re: transmission problem.

So are you sure that the transmission is shifting 1st, 2nd? Do you see the engine rpm drop, which is a sign that it shifts? The reason i'm asking, it could be that the transmission is in limp mode, which is 3rd gear when the shift lever is in D.
You say that it won't go over 40 mph, even if you floor the accelerator? (take care not to redline the engine)
What is the engine rpm then?
Does it feel sluggish?
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Old 07-13-2013, 05:20 PM
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Re: transmission problem.

You r right, i drove it today and it doesn't shift gear, apparently it is stuck in one gear .The rpm is 3k when it reaches 40 mph and yes it feels like sluggish. i forgot to mention that when all this started i discovered that the fluid was leaking so i opened the pan and closed it properly thinking that will solve the issue, but it didnt. So assuming that transmission is in limp mode what shall i do to get out of it?
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Old 07-13-2013, 07:15 PM
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Re: transmission problem.

When the transmission control module (TCM) sees a situation that could harm the transmission, it goes into limp mode. That means 3rd gear when in D or 2nd when the shifter is put in 2. Also a blown TCM fuse or faulty TCM relay gives the same behaviour. So first check the TCM fuse, which is in the power distribution center(PDC) next to the battery. The PDC cover shows the fuse positions. If its blown you could try a new one(its fuse #5). If it blows again, some deeper trouble shooting is needed. If the fuse is ok though, then swap the TCM relay with an equal one in the PDC. Let me know the results, then we can see further.
Edit: just checked the service manual and the only equal relay in the PDC for the TCM is the Auto Shutdown Relay. Just swap them and try to start. If the TCM relay is faulty, the engine will not even start and you have found the problem. If it starts, just try and see what the transmission is doing now.
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Old 07-14-2013, 03:53 PM
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Re: transmission problem.

I just checked the TCM fuse and it looked fine to me then i swapped the TCM fuse and nothing changed. So i swapped the TCM relay with the ASD relay and the engine started well but still nothin change with the transmission. one thing i noticed is the absence of a slight buzzing sound that used to come up whenever i put the shaft into D or reverse, does that mean anything?
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Old 07-14-2013, 05:40 PM
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Re: transmission problem.

The buzzing sound was most probably coming from the TRS/solenoid module inside the transmission. Could be that the TRS/solenoid module is faulty, but normally that should give a check engine light and a P0700 fault code set. Could also be the TCM itself or wiring.
Was the transmission working ok before you changed the fluid, or was it having problems already?
You could try to take it to a place where they can scan the TCM, to see if it has set any fault code, or maybe even is not accesable. Also check the large connector on top of the transmission left side for dirt and/or if the connector is properly connected. There is a bar on the connector which you have to move up and in that way the connector is pulled loose. Also check the wiring as far as possible.
Check the connector on the TCM and see if the pins are all clean.
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Old 07-14-2013, 06:17 PM
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The transmission was working well before I change the fluid and the check engine light is on now, just no code. Would the speed sensor cause such a problem?
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Old 07-14-2013, 08:01 PM
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Re: transmission problem.

That is strange that the check engine light is on, but that you don't get a code. Did you try it several times? Either way, take it to a place where they can scan the TCM for faults, there probably is something.
Won't expect a speed sensor. A faulty speed sensor would cause harsh shifting, but i never heard that it would go into limp mode for that. But a scan will tell more.
Fresh ATF fluid has strong cleaning properties and could remove and dislodge foreign material, which could cause hydraulic passages to be blocked.
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Old 07-15-2013, 05:51 PM
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Re: transmission problem.

hi, in a second attempt with the keydance on/off,on/off, on the code p0700 came on. i cleaned the connectors you mentioned earlier and it didnt solve the problem. i want u to know that am currently in a remote area, no place with TCM scanning capabilities availabe in here. so what does fault code P0700 mean and what can i do to fix this problem?? i really appreciate ur support ..
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Old 07-15-2013, 05:57 PM
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Re: transmission problem.

This might help explain it.


P0700 Transmission Control System TCS Malfunction


If not, Google shows a lot more links for that code.


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