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Old 08-28-2013, 07:22 PM   #121
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Find me a PCM...

I can not find a PCM in the aftermarket from any remotely reputable source. I have called as many as I could find on the internet. The dealer said they will replace mine (even though they are sure it is the transmission) for $925 with no guarantee because I would not do what they recommend and rebuild the transmission.

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Old 08-29-2013, 03:54 AM   #122
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Find me a PCM...

I can not find a PCM in the aftermarket from any remotely reputable source. I have called as many as I could find on the internet. The dealer said they will replace mine (even though they are sure it is the transmission) for $925 with no guarantee because I would not do what they recommend and rebuild the transmission.
Car-part.com I attatched the ones for a 2006 tj 4.0 auto the search term is computer box engine. Hope that helps lowest listed price 200 buckaroo s
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Old 08-29-2013, 05:31 AM   #123
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Thanks Russ, But I looked into this as well. I would be taking a big chance buying a used one. First the part number would have to match perfectly. then you don't know if you get a PCM with the same problem. Also it would have to be programmed to my vehicle, so I would have to go to the dealer to do that. I never asked if the dealer would program a used PCM .
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Old 08-29-2013, 09:54 AM   #124
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Thanks Russ, But I looked into this as well. I would be taking a big chance buying a used one. First the part number would have to match perfectly. then you don't know if you get a PCM with the same problem. Also it would have to be programmed to my vehicle, so I would have to go to the dealer to do that. I never asked if the dealer would program a used PCM .
Good luck in your quest my friend that's all the use I will be
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Old 09-02-2013, 01:04 PM   #125
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I am tagging this thread for future developments. I also have a 06 X with the 4.0 and 4spd auto, that has mysteriously just developed this ailment within the last couple of weeks. I have found that shifting manually and running rpm's up to just over 2,000 before manually shifting her into 2nd seems to help a little with the sudden jolt and jerk that is exhibited. Mine also seems to kind of stall when shifting to second the first time of the day. It seems as though the tranny is kinda slipping as it struggles to slip into 2nd and as rpm increases it suddenly slams into gear. Mine even seems to do it if parked for any significant time. I am gonna keep watching and see if a remedy can finally be found short of a tranny swap.
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Old 09-02-2013, 01:41 PM   #126
Knows a couple things...

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Have you properly checked your transmission's ATF level? Has any other type of ATF beside ATF+4 ever been added to it?
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Old 09-03-2013, 04:31 PM   #127
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Have you properly checked your transmission's ATF level? Has any other type of ATF beside ATF+4 ever been added to it?
I have a pretty short history with mine. Only a couple of months. My first post here pretty much co insides my Jeep ownership. Really wish I had done my research before buying now. Alas hindsight is twenty twenty as they say. I have the problem so I now have to find what it is that might fix it? Has anyone tried taking off in second from a dead stop and then letting tranny shift normally? Or possibly just running her in second gear for a ways just to make sure ports are clear? I may try this out this evening on our daily pre season scouting trips just to see what happens. All fluid levels are good.
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Old 09-04-2013, 11:35 AM   #128
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Well the starting off in 2nd gear seems to be working as far as avoiding that hard shift from first to second on the critical first shift of the day. Jeep seems to have plenty of power taking off this way and I couldn't feel any slipping or surging as might be expected if something was clogged or partially blocked preventing the shift from first to second. I am going to try this for 10 consecutive days and then go back to taking off in Drive and see if the problem still persists. Mostly this experiment is to avoid tearing something up in the tranny or drive train by just living with the problem.
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Old 09-05-2013, 03:42 PM   #129
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I found a place called Carcomputerexchenge.com and pulled the trigger for $380 for a reprogrammed PCM. I talked to a guy called Brian and he seemed to be aware of the problem with this particular year. The PCM is a plug and play and will get to my house on Tuesday the 10th and I will install and report back. I went to two dealers and both wanted to open/rebuild my transmission. I am willing to try this for under 400 than get reamed for $2500 for a new tranny.

I believe I have taken all the steps to eliminate things. I first did a filter fluid change, reset PCM (drives fine for about a week, then reverts back to bad shift), No codes so I assume all solenoids and sensors are OK.

I will run it for a week and report back Bi-weekly.

Brian says they stock these particular PCM's and have various part numbers available. My P/N was P56044702AD.
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Old 09-09-2013, 01:09 PM   #130
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I found a place called Carcomputerexchenge.com and pulled the trigger for $380 for a reprogrammed PCM. I talked to a guy called Brian and he seemed to be aware of the problem with this particular year. The PCM is a plug and play and will get to my house on Tuesday the 10th and I will install and report back. I went to two dealers and both wanted to open/rebuild my transmission. I am willing to try this for under 400 than get reamed for $2500 for a new tranny.

I believe I have taken all the steps to eliminate things. I first did a filter fluid change, reset PCM (drives fine for about a week, then reverts back to bad shift), No codes so I assume all solenoids and sensors are OK.

I will run it for a week and report back Bi-weekly.

Brian says they stock these particular PCM's and have various part numbers available. My P/N was P56044702AD.
If it helps anyone, Amazon also carries them. (Is there anything they don't? ) Here is the link:

94-06 Jeep Wrangler Engine Computer ECU PCM ECM Programmed to your vehicle! : Amazon.com : Automotive


On a side note, just went to the dealer to schedule an appt. The service guy was trying to hand me a line, "if it isn't emissions related, the PCM is not covered under the Federal warranty." Correct me if I am wrong, if it is broken, shouldn't it still be covered?

Help from anyone who has already had this fixed by the dealer... Anything I should say to them so they will just replace the dang thing. Short of me bringing in this entire forum and others. Thx!
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Old 09-09-2013, 08:06 PM   #131
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Here is an update. I received my remanufactured PCM today as scheduled and installed it. Pretty straight forward remove and replace following the instructions that came with the PCM. Took it for a 15 minute drive and it runs perfect. Definitely shifts smoother. So far so good. I am not too excited yet, I will report back in a week to see if it reverts back.

Darthlego, I called the place that lists them on Amazon and they did not have my particular part number in stock. They were quite a bit cheaper though.

Here is what my dealer told me about the warranty issue. If the PCM is not showing any codes then they won't even consider it. I'm not sure if they CAN NOT warranty it or WILL NOT. That is why I went this route. They will replace it for you if you tell them to, but my dealer wanted $1050 to do it. Which is total BS.
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Old 09-10-2013, 11:31 AM   #132
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My little experiment did not work out too good. I didn't realize that this tranny still shifts first to second even though it is supposed to be locked into second gear (or so I thought). I guess I will also be looking into a new PCM as soon as Toddrg reports back on it being successful.
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Old 09-13-2013, 01:00 PM   #133
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OkieOutlaw - I was just on the website Toddrg quoted and the sale price of $369 (plus $20 shipping) expires this Sunday. After that they jump to $499 plus shipping. If you're leaning that way you might want to decide this weekend.
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Old 09-15-2013, 05:58 PM   #134
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Here is an update. Been driving daily since I installed the PCM. It has performed flawlessly. I drive an average of 35 miles per day stopping anywhere from 10 to 40 minutes performing inspections. Transmission has shifted perfect. Saturday I took a long trip to the Shenandoah mountains for some light trails (76 miles each direction) with no problems at all. I have put on over 400 miles so far.

I would say this to anyone who experienced the same problems as me. assuming you are not throwing any codes. If you force flash your computer and it shifts well for a short period, you probably need a new PCM and it will solve your problem. The dealer will charge you about $1000 for this, so getting one aftermarket is a better option.
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Old 09-16-2013, 12:30 PM   #135
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Lovely - My dealer is telling it is my transmission temperature sensor, which was noted as a potential issue earlier in the thread. His words, "...we will fix this and do a transmission flush for $800. If that doesn't solve it we will go from there..."

In reviewing the manual for our transmissions I can't believe they want to charge that much! Of course the love taking the money from those less experienced (never done Transmission work myself) And if the transmission acts up after I or someone else does the replacement, they say we need to start all over again. Crap.
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Old 09-18-2013, 10:35 PM   #136
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My local dealer is telling me that Chrysler has a new update to fix the " hammer shift " problem and supposed to get my jeep back tomorrow after 3 weeks in the shop, I'll keep you guys posted to see if this fixes the hard shifting problem. God I hope so!
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Old 09-21-2013, 04:32 PM   #137
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Update. My shifting problem has come back. I have put on over 500 miles and almost two weeks of driving with no problems and today the hard shifting when cold came back. Very frustrating. I am still not convinced it is the transmission, but at this point I just don't know.
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Old 10-01-2013, 02:08 PM   #138
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I sent the PCM back to Carcomputerexchange.com and they found some problems and are repairing it. They seem to know what they are talking about and say they have experienced problems with 05 and 06 wrangler PCM's and shifting problems. So I will wait to get it back and try it out again.
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Old 10-09-2013, 08:46 PM   #139
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Car computer exchange sent back the new PCM. I plugged it in and went for a ride. After a short trip around the block. The engine light came on almost immediately and the jeep went into what is called "limp mode". So I called them back and they told me I would have to bring it to the dealer to get programmed. Pain in the ass. I ended up getting it towed to the dealer and they reprogrammed it for $110. They drove it seven miles and said come pick it up. There were no codes. The dealer sounded like everything was good, but said if something was going to come back it should happen within 50 to 150 miles. Lets see what happens.
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Old 10-10-2013, 05:26 PM   #140
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Car computer exchange sent back the new PCM. I plugged it in and went for a ride. After a short trip around the block. The engine light came on almost immediately and the jeep went into what is called "limp mode". So I called them back and they told me I would have to bring it to the dealer to get programmed. Pain in the ass. I ended up getting it towed to the dealer and they reprogrammed it for $110. They drove it seven miles and said come pick it up. There were no codes. The dealer sounded like everything was good, but said if something was going to come back it should happen within 50 to 150 miles. Lets see what happens.

Just great... been waiting for 2 weeks for mine from them. I hope I don't get the one you sent back. Good to know what to look out for.
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Old 10-10-2013, 08:18 PM   #141
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OK, I got it back from the dealer today and it has driven well. They did a seven mile test drive and I put on almost 45 miles driving around doing errands, with no problems. I really hope I am out of the woods.

DarthLego, I got the same one back I know for sure. I put some silicone on one of the plugs to hold it and the silicone residue was still there.
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Old 10-16-2013, 07:40 PM   #142
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Started shifting hard from first to second again this morning. Back where I started. Took it back to the dealer. I am now at their mercy as I have no codes and have no idea what is wrong with it. I no longer have my original computer, since it is at Carcomputerexchange.com. Sucks
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Old 10-16-2013, 08:00 PM   #143
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I tried the rebuilt PCM from Carcomputerexchange. Ran fine for 3 weeks then check engine light came on with multiple codes. Reset the pcm and it ran fine for 2-3 days then CEL with same codes. Reset the pcm and its been okay for 2 days. Soon as the CEL comes on again I'm taking it to the dealer. I've read some people have traded PCM's with Carcomputerexchange 3-4 or more times. I tried to save a few bucks but since this is my DD I just need it fixed and move on.
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Old 10-17-2013, 03:06 PM   #144
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Got mine from Computer exchange Tuesday. Either they do a hell of a cleanup job or I got relatively new one that they refurbished. Been good so far and have put about 70 miles on it - Highway and City.

But I did get an odd piece of mail from Chrysler(the same day coincidently). Something about ODB issues with 2005 - 2006 Wranglers. And that I need to bring it in to fix.... I wonder if someone there is finally getting a clue that there is a problem?
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Old 10-17-2013, 05:31 PM   #145
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Dealer called today. They took the jeep out this morning and felt the hard shift, but no codes when they got back, so they took it out with another person monitoring through an obd reader and found a transmission temperature range sensor in the transmission intermittently sending a fault code. They suggested I replace this sensor. To do this they have to drop the pan and remove the valve body (I think). All cost $500. They say it drove fine on the test drive and are going to give it back to me.

I have read on other post in various forums that people have gone this route just to have the issue come back and it has ended up being the PCM. So at this point I just wait and see what happens.
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Old 10-17-2013, 09:06 PM   #146
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Ass soon as I turned the corner after picking up my jeep it shifted hard into second. Another $500 down the tubes. I left it there. I'm sure they will say I need a new PCM, so there goes another thousand or so. I have read hundreds of posts with the same issues and these dealers still don't know how to fix a seemingly common problem.

I am beginning to hate this Jeep. 20,000 miles and this shit happens.

I did get a hold of carcomputerexchange.com today and they said I could get my money back if the dealer changes my PCM. I asked them if they could send me back my original in case I can get some kind of warranty. They said they couldn't because it would already be reconditioned. Which is unfortunate, because they may not even be fixing the actual problem with these things.
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Old 10-17-2013, 09:29 PM   #147
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Oh that realllly stinks. I am really hoping I have better luck with mine from carcomputerexchange... Lets see how things go on my end over the next few weeks. I will report in periodically.
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Old 10-24-2013, 09:26 PM   #148
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Just got my jeep back from the dealer. They replaced a throttle position sensor and it still shifted hard. Then called on Monday and said I needed a new transmission at a cost of $3800. I had them replace the PCM. They charged me another $800. Should have done this right off the bat, but they were telling me it was good. So far it drives fine. Still waiting to hear from Carcomputerexchange to see if they will give me a refund. Just hoping I am done with this.
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Old 10-25-2013, 11:52 AM   #149
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Well that was short lived. Drove fine for about 25 miles and engine light came on. P0601 Still drives fine. From what I am reading it is a bad PCM. Yup that's right a bad PCM brand new from the Dealer. Now what? I'm sure they will say the transmission is causing this. I just can't believe this, so frustrating.
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Old 10-25-2013, 03:49 PM   #150
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Shocking. They agree with me that it is a bad PCM. I wonder which PCM remanufacturer Chrysler uses. 4 working days till I get my 4th remanufactured PCM (twice repaired from Carcomputerexchange and two from the dealer). If there is a god this jeep will fall off the lift.

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