2006 5.7 Trans shift problems - Jeep Garage - Jeep Forum

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  #1  
Old 11-29-2014, 12:16 PM
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2006 5.7 Trans shift problems

Hi JG peeps, having major shifting issues with trans on a WK 5.7 with 82k miles.

Had it to Jeep dealership and they say needs a new trans. They tracked the issue to a problem between input and output shaft modules which they say has to be clutches. We dropped the pan and it appears that the wrong fluid was used. Changed all the filters and let it drip dry but still has a hard shift.

This is a used purchase with less than 1k on since bought. P0700, P0715 are a couple of the DTC's. I think there is one more but I don't have it in front of me.

This trans is a very durable model and I have a hard time believing that the wrong fluid would destroy it in a short period of time. After it warms it will slam between gears and then not downshift.

Any incite into this would be greatly appreciated. I'm sure I missed a couple things so please ask questions.

Was also wondering if this could be a PCM or TCM issue. I did recently pull the engine compartment fuse blocks to replace the struts.

Thanks in advance for any advice.

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  #2  
Old 12-01-2014, 07:30 PM
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Re: 2006 5.7 Trans shift problems

Hello? Thought I'd get a little help. Looks like I need to buy a transmission. Has anybody used anything other then Mopar?


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Old 12-01-2014, 08:30 PM
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Re: 2006 5.7 Trans shift problems

P0715 means that there is a problem with the input speed sensor circuit. Was the wiring already checked?
For good trouble shooting all the present fault codes must be known.
When dropping the pan, you will only get max 7 qts of fluid out, the other 6 qts are still in the torque converter. Any idea which fluid was used?
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  #4  
Old 12-01-2014, 10:06 PM
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Re: 2006 5.7 Trans shift problems

Hi, the Input Speed Sensor RPM was checked and found to be above 400 RPM. The wiring was then checked and seemed to be correct. The fluid was drained and appeared to be a Dexron. It did not have the ATF+4 strong odor. There was what looked like dark gray clutch dust in the pan but no metal. I bought this Jeep from a Chevy dealer and the CarFax showed complete dealer maintained upkeep including all fluid change at 55k. It looked to be that somebody was in the pan recently. I just had it back to the dealer that I bought it from 1000 miles ago and they are blaming it on the new 20" wheels and 255/50/R20 tires. I call BS on that and they are using it as an out. Thanks for your help.
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Old 12-02-2014, 04:48 AM
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Re: 2006 5.7 Trans shift problems

Was the input speed sensor 400 rpm misreading? Was the input speed sensor changed?
The clutch dust probably indicates a slipping clutch or maybe a clutch which doesn´t release completely. Was the fluid not burnt?
But a fault in a speed sensor will give shift problems and it can be that it will go into limp mode after some shifts.
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  #6  
Old 12-03-2014, 06:08 PM
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Re: 2006 5.7 Trans shift problems

Hi, sorry for the late response. Yes the input speed sensor was replaced and no the fluid wasn't burnt.


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Old 12-03-2014, 06:10 PM
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Re: 2006 5.7 Trans shift problems

I'm undecided how to replace the transmission. Whether to use a Mopar transmission, remanufactured, or a junkyard factory trans with low mileage.


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Old 12-07-2014, 09:25 AM
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Re: 2006 5.7 Trans shift problems

Hi, just wanted to follow up on the latest. Had the Jeep to a local trans shop and they tried changing the input speed sensor again. Same issue. They think its the computer not the trans. $700 part, $300 labor. Will know mid week. ��
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Old 12-07-2014, 08:26 PM
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Re: 2006 5.7 Trans shift problems

Just a heads up.....the Transmission Control Module (TCM) is an integral part of the Powertrain Control Module (PCM), and is only replaceable as a unit. R and R of this unit (located on the right fender well under the hood near the firewall) takes only about 1/2 hour. If the new unit comes preprogrammed, as it should, there shouldn't be much else that needs to be done. Also, are they absolutely sure this is the problem (did they check it with a computerized test tool?), or are they just "thinking" this is the problem? What happens if it's not? Probably you're out $1000 and still have the problem. Can you tell that I hate parts replacers (which most stealers and a lot of independents are) that don't do proper troubleshooting to find out, with near certainty, what the problem is? Too many today just replace parts, at your expense, until they stumble on the real problem. These forums are full of horror stories. Just don't want you to be one of them.

I just looked at a couple other posts. How much clutch material was found in the pan? Did it look like rag lint, which is what it should look like. A gray powder usually means metal. It'll almost feel like a clay if there's a bunch of it. Was there anything on the magnet? Did all this begin right after you had the had the power modules out to replace the struts? 20 in. wheels have nothing to do with this. I've been running 20's on mine for a long time, without issue.
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  #10  
Old 12-07-2014, 10:28 PM
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Re: 2006 5.7 Trans shift problems

Quote:
Originally Posted by jeepgcoman View Post
Just a heads up.....the Transmission Control Module (TCM) is an integral part of the Powertrain Control Module (PCM), and is only replaceable as a unit. R and R of this unit (located on the right fender well under the hood near the firewall) takes only about 1/2 hour. If the new unit comes preprogrammed, as it should, there shouldn't be much else that needs to be done. Also, are they absolutely sure this is the problem (did they check it with a computerized test tool?), or are they just "thinking" this is the problem? What happens if it's not? Probably you're out $1000 and still have the problem. Can you tell that I hate parts replacers (which most stealers and a lot of independents are) that don't do proper troubleshooting to find out, with near certainty, what the problem is? Too many today just replace parts, at your expense, until they stumble on the real problem. These forums are full of horror stories. Just don't want you to be one of them.

I just looked at a couple other posts. How much clutch material was found in the pan? Did it look like rag lint, which is what it should look like. A gray powder usually means metal. It'll almost feel like a clay if there's a bunch of it. Was there anything on the magnet? Did all this begin right after you had the had the power modules out to replace the struts? 20 in. wheels have nothing to do with this. I've been running 20's on mine for a long time, without issue.


First, thanks for your help. Let me try to answer these in order.

They are replacing the PCM and I was told it had to be flashed. I have it at a trans shop and when he test drove it he didn't think it was the trans. They tried another input speed sensor that they had (the Jeep dealer charged me for the first one that didn't solve the problem) just to see if it changed the shift issue and it did not. I was told there was no way to know for sure the PCM was bad, it could just be erratic. The problem is you can't trust these guys and I try to be as educated as I can but this has me stumped.

My son is stationed on Cape Cod with the Jeep and I'm in MD. He took it to the dealer after the hard shift and check engine light and they tried to sell him a trans. I flew to Boston to try to make sense of the whole thing and that's when I found out they never dropped the pan and I had them do it when I was there. It didn't look too abnormal to me, no metal on the mag and a little gray settlement on the filter and pan bottom. They tried to say it was the wrong fluid and the trans was still bad. That's when I took it back to MD for service.

I thought about the the power modules that I disconnected to replace the drivers side strut when I was going through all this in my head but forgot to check them again. I did have a starting problem (crank but no fire) when I put it back together after the strut change and I went back through unplug and plugging in the modules and it fired. I drove the Jeep 600 plus miles after the strut change with no issues. Right before the shifting problem the rear TMS keep losing its connection. I thought this was a aftermarket sensor from the new wheels and I changed them with MOPAR. It did not solve the occasional drop of signal to the rear TPMS.

The transmission service center has not replaced the PCM as they just told me about it as they were closing Saturday. I would guess that they are going to buy it tomorrow and replace it by Tuesday. At this point the whole thing just has me frustrated. Thanks
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