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Old 03-19-2016, 03:32 PM
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Unhappy 42RLE Unsolved Misery

I am the owner of a 2003 Jeep Wrangler (Sahara) 4.0L and 42RLE transmission. My nightmare started when driving to work the transmission started make a clunk noise followed by smooth bump, just like if someone rear ended the vehicle. If I put the transmission in Neutral and let it slow down, no problems. If I turn off the OD, no problem. The jeep went to a local shop (good reputation and honest). The diagnostic tool indicated the need of re-flashing the PCM. At the dealer, they told me that they couldn't flash the PCM because of the mileage 158,000. So, I am back to square one. A transmission acting up. Someone out there had to experience my same problem and resolved. I see Jeeps like mine running around. I will take any honest and good faith advise.



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Old 03-19-2016, 04:37 PM   #2
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Please explain what high miles on odometer has to do with ability to update flash memory

Not saying a flash is the answer or even useful as it was running fine with current programming but what you say the dealer said as a reason makes zero sense to me

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Old 03-19-2016, 06:01 PM
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Thanks for responding.
The dealer basically stated to me that the PCM was up to date and that the re-flash will not do any good because of the millage (158,000) of the vehicle in other words will not fix the problem.
Now assuming that the infinite wisdom (sarcasm) is correct. What is the next step? What other owners done to fix the problem and continue to enjoy such a great vehicle.
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Old 04-06-2016, 02:59 PM   #4
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My '03 began doing something like that at about 23000 miles, but only when coming to a stop. I called the Jeep dealer and described what it was doing and the service manager asked, "Does it feel like someone bumped you from the rear?" I said, "Yes! That's exactly what it feels like." They said bring it in, and it was fixed for the $100 deductible since I still had some warranty left.

I got the idea that they rebuilt the tranny, and that there may have been a service bulletin on the problem at the time. The service manager sure asked the right question. I've read that others have experienced the problem I had as well. Of course, there is no way to know if it's the same as yours.

When I picked up the Jeep after it was fixed, I asked the mechanic what caused the problem. His answer, "Well, it is a Chrysler transmission."

It's been perfect ever since.
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Old 04-06-2016, 09:02 PM   #5
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When is the last time you put a new filter on it and put fresh ATF+4 in it?
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