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Old 06-24-2013, 02:51 PM   #91
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Awww caca... I totally missed that line. Well at least I haven't installed them yet. I still may take a peak at the old ones to see if they are beat up and worth replacing.

I guess it is the PCM

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Old 06-24-2013, 07:44 PM   #92
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I had hard shifts ( I described it as hammer shift) and a popping noise with my 06 LJ with auto trans. I have since got a newer jeep. I spent many dollars looking into the issue (replaced cpm/tcm, flush etc.) It was finally fixed when the tech looked at the linkage and noticed it wasn't lining up properly every time it was put into gear. I would get them to look into that.

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Old 06-26-2013, 12:50 PM   #93
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This now happening to my 2006 TJ 60,000 miles Automatic. It started 2 months ago. I went to lunch and on the way back to the office it shifted extremely hard into 2nd gear. It scared the crap out of me so I made an appointment with a transmission shop for the following week. I drove around that weekend and it never occured again so I canceled the appt. After a couple weeks it did it again. So I made an appt for the dealership to check it out figuring if it's a known issue after reading all these posts. They had it all day and couldn't replicate it on their test drives. They hooked it up to the computer and nothing was out of the ordinary. So now this past weekend it started doing it on every cold start. I can feel it now and know it's gonna happen when my RPMs get past 2000 and it hasn't shifted to 2nd yet. If I give it just a bit more gas, I'm holding on ready for the lunge. I took it to the transmission shop this morning and he just called. He said the temp sensor is reading over 1000 degrees then cools off to 20 degrees. Obviously THAT'S not right. To solve this he'll have to replace the selonoid pack. BUT he isn't guarenteeing that by replacing the selonoid it'll solve my shifting problem. I sure am hoping it will because the next step is to rebuild the tranny. I'll let you know later this week.
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Old 06-26-2013, 12:51 PM   #94
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Here's an update. I may be writing this wrong as I'm in no way a mechanic but this is how I understand it. The tranny mechanic ordered a new seloid pack. When it arrived today he compared the wiring schematics with the one in the jeep and they were different. Which meant the temp sensor is in the PCM instead...which is what I've been telling him is faulty all along. He called his buddy at the local jeep dealership to see if he knows any inside information. Apparently the 06 Wranglers that were built in March 06 all have different wiring or something like that. Basically the way I understand is there was a bad batch of jeeps. WTF??? No recall? Does Chrysler admit this? My inside guy is checking this out. Needless to say the next step will be to replace (what everyone has been telling me) the PCM. Whether or not it will be under some sort of warrenty or recall....i doubt it. At this point I just want it fixed. If $600 will fix my jeep..I'll be a happy man.
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Old 06-28-2013, 08:17 AM   #95
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If you're having this issue and your Jeep in within the 8yr/80,000 range, the PCM is under the Emissions warranty. Take it to your nearest dealership and tell them to replace it. That's what I did this week. I'll pick up the Jeep today and I'll post an update later. If it wasn't for this and many other forums, I would have had to pay for a new selonio, tranny, etc. Luckily I only have 60,000 on my 06 TJ.
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Old 06-28-2013, 10:46 AM   #96
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If you're having this issue and your Jeep in within the 8yr/80,000 range, the PCM is under the Emissions warranty. Take it to your nearest dealership and tell them to replace it. That's what I did this week. I'll pick up the Jeep today and I'll post an update later. If it wasn't for this and many other forums, I would have had to pay for a new selonio, tranny, etc. Luckily I only have 60,000 on my 06 TJ.
Winner Winner, Chicken Dinner!!! I did some digging on Jeep's site. And found this which confirms everything. (See Page 8 & 9)

http://www.jeep.com/crossbrand/warra...icCoverage.pdf

Now I just have to go in and try to convince the dealership that the PCM is the issue....
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Old 06-28-2013, 05:53 PM   #97
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I just hit 79,000 miles. I'll get mine scheduled for a trip to the shop next week. THANK YOU very much for the information. I was cringing at the thought of that repair bill.
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Old 06-30-2013, 09:42 PM   #98
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I've had a few drinks, so excuse what may be a dumb question, but say we bring it in to the dealership, tell 'em we want the PCM replaced... exactly what warranty would we say we know it's covered under?

I suppose I'm more interested in hearing exactly how the Carpejeep's conversation went with the dealership. Suppose we can hear that w/ the update...
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Old 07-01-2013, 01:43 AM   #99
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Count me in. I had just made a thread about it before I discovered this one - apologies.

06 LJ w/83k miles. Happened for the first time today. So at this point I'm assuming the best option is the possible PCM replacement "band-aid"?

This sucks.
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Old 07-01-2013, 06:12 PM   #100
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I started getting this exact same problem in my 06 Wrangler, Unlimited Rubicon if it matters, with just less than 75k miles. I reset the PCM per the directions given earlier in this thread, and the problem disappeared for about two weeks. After it came back I took it to a tranny shop. They indicated that two codes were posting. I can't remember the numbers off the top of my head, but one was a high temp fault and the other high tranny temp. Their proposed solution was to drop the pan and change the temperature range sensor at the tune of $600 or so.

Based on the information in this thread, I told them I wanted them to replace the PCM. After a little fussing, they said OK. It wasn't cheap - $600 for the PCM, $150 for programming, and maybe $40 for installation. Their quote was slightly cheaper than the dealership so I went ahead with it. I looked into purchasing the PCM preprogrammed from online vendors and installing myself, but they seemed hard to find. And the shops that had them available were sketchy after looking at BBB ratings.

Almost two months later now and I've had no shifting problems since replacing the PCM. As others have suggested, if you're having the same problem and resetting the PCM temporarily fixes it, then replace your PCM first. It may not work 100% of the time, but unless you have other information it seems to be working more often than not.
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Old 07-01-2013, 06:23 PM   #101
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I started getting this exact same problem in my 06 Wrangler, Unlimited Rubicon if it matters, with just less than 75k miles. I reset the PCM per the directions given earlier in this thread, and the problem disappeared for about two weeks. After it came back I took it to a tranny shop. They indicated that two codes were posting. I can't remember the numbers off the top of my head, but one was a high temp fault and the other high tranny temp. Their proposed solution was to drop the pan and change the temperature range sensor at the tune of $600 or so.

Based on the information in this thread, I told them I wanted them to replace the PCM. After a little fussing, they said OK. It wasn't cheap - $600 for the PCM, $150 for programming, and maybe $40 for installation. Their quote was slightly cheaper than the dealership so I went ahead with it. I looked into purchasing the PCM preprogrammed from online vendors and installing myself, but they seemed hard to find. And the shops that had them available were sketchy after looking at BBB ratings.

Almost two months later now and I've had no shifting problems since replacing the PCM. As others have suggested, if you're having the same problem and resetting the PCM temporarily fixes it, then replace your PCM first. It may not work 100% of the time, but unless you have other information it seems to be working more often than not.
Glad to hear it's working for you. Thanks for the input!
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Old 07-30-2013, 11:49 PM   #102
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I had my PCM replaced today and the problem seems to be resolved. Not only that, everything powertrain-wise feels and operates a lot smoother.
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Old 07-31-2013, 01:41 AM   #103
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having same issues! PCM better fix it!
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Old 08-01-2013, 07:55 PM   #104
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Question, does anyone know if you can salvage a computer out of a 97 tj and use it in a 06 to fix this issue? Long shot as i know several things are different but gotta ask as i can get one for $25.
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Old 08-01-2013, 08:13 PM   #105
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Mines at the dealership right now. For the same 1st to 2nd shift problem(hammer shift) It only has 22,700 miles on it. I will post up what they did to fix it when I get it back. RD
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Old 08-02-2013, 01:12 PM   #106
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Question, does anyone know if you can salvage a computer out of a 97 tj and use it in a 06 to fix this issue? Long shot as i know several things are different but gotta ask as i can get one for $25.
No, computers for 05-06 are significantly different from previous years, IIRC.
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Old 08-03-2013, 03:32 PM   #107
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Got the jeep back from the dealership today with a new PCM in it. Covered under the warranty. Drives great!!!
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Old 08-03-2013, 07:23 PM   #108
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How did you manage to get it replaced under warranty?


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Old 08-03-2013, 08:50 PM   #109
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8 years or 80,000 miles on drive train. Mines a 06 with 22,700 miles on it. I've got one more year left on the warranty.
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Old 08-03-2013, 08:55 PM   #110
Knows a couple things...

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Quote:
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Question, does anyone know if you can salvage a computer out of a 97 tj and use it in a 06 to fix this issue? Long shot as i know several things are different but gotta ask as i can get one for $25.
Not even close, '99 and older computers are vastly different from 2000 and newer. Even most sequential years are different enough so the only recommended ECM (engine computer module) replacement is with the same model year, same engine, and same transmission type.
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Old 08-06-2013, 01:39 PM   #111
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8 years or 80,000 miles on drive train. Mines a 06 with 22,700 miles on it. I've got one more year left on the warranty.
RD
Did they give you any grief? I have yet to take mine in for "fear" of them being stubborn.
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Old 08-06-2013, 04:52 PM   #112
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No, I told the service writer it might be the PCM. Then when I called to check on it, They had not diagnosed the problem yet. I told them to please tell the tech to check the PCM. Next call I got is that it was done and they replaced the PCM
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Old 08-07-2013, 12:37 AM   #113
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Question : it's seems that auto transmission or PCM issue just occurred on 06 TJ or,
05 TJ may be encounter this issue ?


Mine is 05 auto TJ, 55K mileage.
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Old 08-20-2013, 01:16 PM   #114
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My rig has this problem, but since my rig has a rebuilt title, I can't use warranty. Has anyone had any recent luck with online vendors for new PCM?
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Old 08-20-2013, 03:54 PM   #115
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A new PCM fixed my trans shift problems. My PCM took a dump and threw a MIL.
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Old 08-22-2013, 08:12 PM   #116
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I have an 06 tj sport and it started shifting hard from 1st to 2nd this past weekend, after reading these post I took it to my local dealer and they said I was crazy and nothing was wrong with PCM or anything else with my jeep. They said it shifted fine and was not spitting out any codes. My jeep only has 49000 miles and is covered under 8/80000 warranty . I made copies of some of these posts and wouldn't even read them. I'm kinda stuck now and don't know what to do?
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Old 08-22-2013, 08:22 PM   #117
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This is exactly whats happneing to my '04 tj sport. I have 124,000 miles. thought i was the only one...
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Old 08-23-2013, 04:58 PM   #118
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I am in the same boat. 2006 TJ 19,730 miles Auto with the shifting problem when cold. Brought it in to the dealer on Tuesday. Today they call and say they need to rebuild the transmission. They won't do anything with the PCM because it isn't spitting out any codes. They can't warranty the PCM if there are They don't give a shit about all this information I showed them on the forum.

Here is my dilemma:

I can't finds a PCM on the internet and even if I did the computer places have the worst feedback.

I force flashed the PCM and it drives fine for about two weeks. Would that mean there is a problem with the PCM?

Could I have a problem with the Transmission? I only have 19,700 miles. Should I take it somewhere else?

I'm screwed aren't I...
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Old 08-23-2013, 09:14 PM   #119
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Dont let hem rebuilt your transmission. If it really bothers you, pop for a new PCM.


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Old 08-24-2013, 04:27 PM   #120
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I'm just going to get a new PCM and put it in before it tears my tranny up.

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