Tranny issues fixed for latest models? - Page 2 - 2014+ Jeep Cherokee Forums
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post #11 of 31 (permalink) Old 02-10-2017, 12:07 PM
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My '15 was built in November of 2014 and I think I got one of the first Cherokees to have the transmission that didn't have the snap-ring problem. December is the official date for that but I think I got lucky. Anyway, it's had maybe three software updates and each has improved the shifting, though it was never real bad to start with. The remaining problem was an occasional hard upshift into 5th and that seems to have been resolved with the last update, TSB 18-035-16. So far, so good at over just 50,000 miles.

2015 Cherokee Limited - Ordered 10/21 and built 11/14. Took delivery on 11/21/14 - Deep Cherry, V6, ADII, all the tech stuff and options except a sunroof, CD player, subwoofer and charging pad.
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post #12 of 31 (permalink) Old 03-02-2017, 06:05 PM
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Hi All,

I have been reading about the ongoing transmission situation and strange, I have no idea where I am with this. I have a '15 TH w/2.4L that was purchased late April of '15 and according to the driver's door info was built '8-14'. The vehicle has just over 14,000 miles on it.

The transmission has always behaved with a lag in response while in 'Auto', but seemed somewhat better initially after the S55 recall last summer, yet it really isn't. The truth is, it has always felt like it was slipping during acceleration and I have never noticed the 2nd gear during deceleration either.

I was at the dealer again last week for another round of software loading and when I mentioned the transmission concern, I was told that it could improve with one of the new uploads. It has not.

So far, I have not had one instance of any diagnostic problem associated with vehicle response, but there is an issue with acceleration. My wife hardly ever drives it and while driving a few days ago she asked me what was wrong with the vehicle. I'm kidding myself by thinking everything is ok because there are no diagnostic faults when it's obvious something is and has always been wrong.

My question is, what would my options actually be in the experience of you folks and do I have a leg to stand on? Comments or advice are appreciated.

2015 Trailhawk; 2.4L; Factory Tow package; 8.4A, 6 speaker - upgraded with Pioneer (dash) and Rockford Fosgate (doors) speakers; Remote CD; Rage Powersports roof bars; GoRhino black hitch step; Auxbeam 12" LED light bar.
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post #13 of 31 (permalink) Old 03-02-2017, 08:36 PM
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Unfortunately the response will most likely be 'operating as intended'. However you could argue the point though not sure how successful you will be.

The original design used second gear on deceleration but being a '14 build will have the old hardware and the newer software to prevent it dropping into 2nd. So it's operating as redesigned, not as originally designed..

Sent via Tapatalk from a small keyboard on my phone with fat thumbs and no glasses...

Cheers, Dave.


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post #14 of 31 (permalink) Old 03-04-2017, 10:19 PM
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Dave,

Thanks for the reply and I'll bet you're right - if it isn't completely broke, it won't get fixed.

I was not aware of the old vs. new hardware and how the software works with that in mind. I should learn more about it all, but what I don't understand is the snap ring relationship to transmission function, or malfunction. There is a lot of info on this site, but it's confusing on where to start.

2015 Trailhawk; 2.4L; Factory Tow package; 8.4A, 6 speaker - upgraded with Pioneer (dash) and Rockford Fosgate (doors) speakers; Remote CD; Rage Powersports roof bars; GoRhino black hitch step; Auxbeam 12" LED light bar.
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post #15 of 31 (permalink) Old 03-05-2017, 01:08 AM
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Originally Posted by Leems View Post
.... if it isn't completely broke, it won't get fixed.

.... but what I don't understand is the snap ring relationship to transmission function, or malfunction.
That's right. Transmission has to fail (snap ring shifts or pops out of its groove) to be replaced, otherwise software patches is what it gets.

Details are shown here: http://www.wk2jeeps.com/Misc/Cheroke...21_008_15b.pdf.

Sometime around the beginning of calendar year 2015 the faulty hardware problem was apparently fixed for all transmissions going forward. However, not all transmissions before CY 2015 were faulty.

That's about the sum of it.
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post #16 of 31 (permalink) Old 03-05-2017, 01:33 AM
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I have an issue with my trans every now and then. Was worse when I first got my car but had an update since then. The issue is when I pull out in front of traffic or just in general sometimes my jeep just won't go. Literally pedal to the metal
.. the car just won't budge. It takes like a few seconds
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post #17 of 31 (permalink) Old 03-05-2017, 09:02 PM
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Quote:
Originally Posted by Array View Post
That's right. Transmission has to fail (snap ring shifts or pops out of its groove) to be replaced, otherwise software patches is what it gets.

Details are shown here: http://www.wk2jeeps.com/Misc/Cheroke...21_008_15b.pdf.

Sometime around the beginning of calendar year 2015 the faulty hardware problem was apparently fixed for all transmissions going forward. However, not all transmissions before CY 2015 were faulty.

That's about the sum of it.

So that's it - snap ring failure gets the work done. I wonder what percentage or pre-2015 snap rings failed? FCA should have that data. Maybe I don't have a faulty transmission, but I do know the response to throttle is not good. Sounds like my only hope for a fix is transmission failure while still in warranty and that is a fairly ugly solution.

2015 Trailhawk; 2.4L; Factory Tow package; 8.4A, 6 speaker - upgraded with Pioneer (dash) and Rockford Fosgate (doors) speakers; Remote CD; Rage Powersports roof bars; GoRhino black hitch step; Auxbeam 12" LED light bar.
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post #18 of 31 (permalink) Old 03-05-2017, 09:03 PM
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Quote:
Originally Posted by ambiguity View Post
I have an issue with my trans every now and then. Was worse when I first got my car but had an update since then. The issue is when I pull out in front of traffic or just in general sometimes my jeep just won't go. Literally pedal to the metal
.. the car just won't budge. It takes like a few seconds
What year and vehicle version do you have?

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post #19 of 31 (permalink) Old 03-05-2017, 10:10 PM
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Originally Posted by Leems View Post
.... I wonder what percentage or pre-2015 snap rings failed? FCA should have that data. Maybe I don't have a faulty transmission, but I do know the response to throttle is not good.
There are generally three groups: 1) Transmissions that failed and were replaced (early on, many were apparently replaced with rebuilt faulty transmissions so were not any better, and that's why the few owners today that experience failed transmissions are encouraged to demand 'new' transmissions rather than rebuilt), 2) Transmissions like yours and mine that are potentially faulty but have been protected with a shift pattern change, and 3) Transmissions that were not faulty. FCA may know the statistics but no one expects that info will be made public.

When needed, use ERS to manually force the transmission to an appropriate lower gear.
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post #20 of 31 (permalink) Old 03-05-2017, 11:46 PM
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Quote:
Originally Posted by Array View Post
There are generally three groups: 1) Transmissions that failed and were replaced (early on, many were apparently replaced with rebuilt faulty transmissions so were not any better, and that's why the few owners today that experience failed transmissions are encouraged to demand 'new' transmissions rather than rebuilt), 2) Transmissions like yours and mine that are potentially faulty but have been protected with a shift pattern change, and 3) Transmissions that were not faulaty. FCA may know the statistics but no one expects that info will be made public.

When needed, use ERS to manually force the transmission to an appropriate lower gear.
This is good stuff here. If I have this right, we are firmly in category #2. To engage ERS, is that moving the shifter left from Drive? I typically only use that for highway driving, but maybe I should use it more frequently?

In Sport mode, there is no lag, so maybe this works around the slipping felt in Auto?

Lastly, if at nearly 15,000 miles if the transmission hasn't failed, it may be ok (or maybe not enough miles)? I did see in that transmission swap out link that FCA targeted specific VIN numbers or 'VIP' numbers (whatever that means) - maybe they were expected to have trouble with those?

2015 Trailhawk; 2.4L; Factory Tow package; 8.4A, 6 speaker - upgraded with Pioneer (dash) and Rockford Fosgate (doors) speakers; Remote CD; Rage Powersports roof bars; GoRhino black hitch step; Auxbeam 12" LED light bar.
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