My 2014 Trailhawk transmission journey. - 2014+ Jeep Cherokee Forums
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post #1 of 9 (permalink) Old 03-20-2017, 12:22 PM Thread Starter
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My 2014 Trailhawk transmission journey.

I have posted the majority of this in another thread but in an effort to keep things concise and easy to follow I thought I would just move everything into one thread. Also my issues don't seem to be a result of the S55 recall which is where I originally posted.

Some background on the car. It is a 2014 Trailhawk with the 3.2l v6. No towing package, but it does have the factory hitch installed. I bought it certified pre-owned in Sept of 2015 with ~22k miles on it. After the excitement of the new car wore off I noticed the hesitation to accelerate when not coming to a complete stop, which many have complained about. After many trips to dealers and plenty of various flashes nothing seemed to make a difference. We decided we could live with it and continued to drive the jeep. Fast forward to Jan 2017 our troubles began. Initially thinking I had a bad harness related to the S55 recall, I made the post below in another thread.

Quote:
Originally Posted by Pitcherman View Post
So I thought I would post my experiences as of late. I've had my 2014 trailhawk for over a year. Until recently the only "issue" I had with the transmission was the lag and the lunge forward from a rolling stop. It was annoying but wasn't really a big deal to me. Fast forward to just after new year I was driving home from a 300 mile trip and about half way through the trip the trans starts acting like it can't decide which gear it needs to be in. It would be cruising in 8th and then suddenly pull out of gear and spend a few seconds hunting for a gear before deciding on one. Typically it was slowing down enough during this time that it would drop back into gear around 5th or 6th and speed back up eventually shifting into 8th again. I knew I was going to be taking the jeep in for the S55 recall anyway so I decided to wait to call the dealer to get a better handle on what conditions were causing this new behavior. A couple of days later the trans threw a code and dropped into neutral. I was able to get going after a brief stop and restart. At this point the jeep went to the dealer and they performed the S55 re-flashes, but from what I can tell did not replace the harness.

After picking up the jeep I noticed it was still doing the gear hunting on occasion but it is inconsistent on when it does it. Then this weekend it threw a code again and dropped into neutral. So at this point it will be going back to the dealer to fix a problem that should have already been handled.
After that second dealer visit the paperwork showed that the Jeep was throwing a P1DCD code "Multiple clutchs lock up". As a result they replaced the TCM (part number 68225514AB for anyone interested) and returned the vehicle to us. Then this weekend, just over a month after the second repair, the first being the S55 recall which didn't actually repair anything, the Jeep is doing the same thing, dropping into limp mode and leaving us coasting down the road without power.

So the Jeep will be going back to the dealership tomorrow 3/21/17 and they also want to discuss possibly buying the vehicle back, which I've read is pretty much a wasted effort with FCA. I will continue updating this thread so as to not clog up other's threads.
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post #2 of 9 (permalink) Old 03-20-2017, 02:06 PM
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Best of luck in getting it all sorted out...

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post #3 of 9 (permalink) Old 03-20-2017, 07:11 PM
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You are a patient person and I wish you luck. Possibly with the dealer on your side (selling dealer?) FCA may have an interest in making you happy. Or possibly there is a new transmission in your near future, which would probably solve your issues.

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post #4 of 9 (permalink) Old 03-21-2017, 06:53 AM Thread Starter
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You are a patient person and I wish you luck. Possibly with the dealer on your side (selling dealer?) FCA may have an interest in making you happy. Or possibly there is a new transmission in your near future, which would probably solve your issues.
It is not the selling dealer, fortunately we have a little bit of a re pore with the dealership we use. I honestly just want it fixed. I'm not too keen on the idea of going through a buy back process in which I'm almost positive I would lose money on.
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post #5 of 9 (permalink) Old 03-22-2017, 07:25 AM Thread Starter
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Not much of an update, but the vehicle was dropped off at the dealership yesterday and they verified that it is throwing the same code as before. Sat down with the gentleman that wanted to discuss "buy back" options which turned out to be nothing more than the dealer trying to convince us to trade in our jeep on a newer one. I don't really see the value in that. I'll keep updating as I get word from the dealer on the state of repairs.
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post #6 of 9 (permalink) Old 03-22-2017, 08:44 AM
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Quote:
Originally Posted by Pitcherman View Post
Not much of an update, but the vehicle was dropped off at the dealership yesterday and they verified that it is throwing the same code as before. Sat down with the gentleman that wanted to discuss "buy back" options which turned out to be nothing more than the dealer trying to convince us to trade in our jeep on a newer one. I don't really see the value in that. I'll keep updating as I get word from the dealer on the state of repairs.
That's BS, but I'm not surprised... them suggesting a trade and not a buy back. Obviously, they would come out the winner in that scenario. SMH
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post #7 of 9 (permalink) Old 03-22-2017, 08:49 AM
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Quote:
Originally Posted by Pitcherman View Post
Not much of an update, but the vehicle was dropped off at the dealership yesterday and they verified that it is throwing the same code as before. Sat down with the gentleman that wanted to discuss "buy back" options which turned out to be nothing more than the dealer trying to convince us to trade in our jeep on a newer one. I don't really see the value in that. I'll keep updating as I get word from the dealer on the state of repairs.
Kind of figured that was what the dealer was pulling off. You just can never trust the sales department completly.
But your solution is simple!
You need a new transmission.
Some 2014 Cherokees are prone to transmission failures. Some sudden and some slow and painful.
Background:
Mid 2015 FCA started using a new hardware equipped transmission. They had some issues with the older one such as a snap ring positioning problem in the prior transmission.
If the snap ring pops your transmission is toast very fast.
They issued several updates most notably the RO1 to address this issue in the older hardware equipped transmissions. It was addressed only by way of a software update.
Most notably this software update removed 2 on the down shift. So in other words if you have not come to a complete stop and you attempt to accelerate you are accelerating from gear 3 and not 2.
The slower you are going in gear 3 the more of an issue you may get accelerating.
Also your TCM seems to be still struggling with some AL (adaptive learn). That is just a AI system the ZF uses to customize to a driver. That should not be an issue at 22k even with a new driver.
I suspect that was one of the reasons they replaced the TCM.
I had many of those same issues in my first 1,000 miles or so. But they went away.
*Your S55 recall was simply a software update and a test of the cable integrity to deal with a cable that would crimp. Limp mode was what it was suppose to do in the event of a problem.
Thus there is a problem.

As far as the issues of "not coming to a complete stop" those I believe are inherent with the software adjustments that FCA made to adjust to the hardware issue with the older ZF transmissions.
I deal with them and do try to avoid the situations of slow speed creep, especially when towing.
If replacing the TCM and new software have not resolved your gear hunting and funky gear usage then a new transmission will resolve your issue I am sure.
That 2014 transmission can have inherent issues and in my opinion should be replaced if software and TCM replacement does not fix the issue.
My dealer told me in 2015 when I had that transmission discussion with them: If I should notice a change in normal operation of it get it in and they will deal with it.
Mine has been perfect to date but still is a bit funky with that 1,2,3 gear downshift issue which I try to avoid. Any change in shifting like roughness, hesitation, and gear hunting it will be a new transmission. The transmission is a mechanical device and if one even one of the dog clutches are malfunctioning no amount of software updates will fix it.
Good luck and start pushing for a new transmission. I am sure the dealer on a trade in with you for a new vehicle will replace it under warranty and sell it on the lot.

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post #8 of 9 (permalink) Old 03-22-2017, 11:32 AM Thread Starter
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That's BS, but I'm not surprised... them suggesting a trade and not a buy back. Obviously, they would come out the winner in that scenario. SMH
Yeah, they're in the business of making money so it really isn't a surprise that they would default to the option that would put the most money in their pocket.
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post #9 of 9 (permalink) Old 03-23-2017, 09:35 AM Thread Starter
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Small Update. Received a call from the dealership yesterday evening, they're ordering a new transmission for the vehicle. From what I gathered after seeing the same code for the third time in three months they decided it wasn't even worth looking into the issue any deeper and just ordered a new transmission. I was given an estimate of a week before they will be done. I am hopeful that this will be the fix that everyone claims it will be but I'm going to hold off on the celebration beers until I have the jeep back and working properly.
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