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NEW Transmission Update Feb 2 Announcement

44K views 160 replies 48 participants last post by  iwbull 
#1 ·
#7 ·
Took mine in today for axle replacement. They said they had the new update for the transmission and were going to do that too. I told them at times mine lurches forward when almost to a stop, and when going up a hill it will not downshift unless I give it a lot of throttle. I asked if the update addressed those issues he replayed lets hope so...yup lets hope so.
 
#8 ·
Just dropped mine off about an hour ago. They mention there are a "couple" updates available so I'm curious to see what they do.

Also had a squeak sound coming from the rear at certain speeds in the cold (the squeak followed tire rotation speed), apparently its a known problem with some seal. I'll find out more later.
 
#52 ·
I have that also ... when it's really cold I hear that squeak coming from what it seems the right rear ... only last a few minutes until the car warms up it seems ... please let me know the outcome :wink:
 
#9 ·
I have 25K miles on my Cherokee with no transmission problems, should I have the update performed or go with the mindset "If it ain't broke, don't fix it"
 
#10 · (Edited)
You COULD go with the mindset "if it ain't broke, don't fix it"... but the update apparently prevents future wear and problems. So, if you go without the update, there might be a chance of something failing down the road because it wasn't re-calibrated.

So, the old saying "if it ain't broke, don't fix it" is old for a reason. Think of it as Windows Vista, if you're a computer person. Vista was the worst operating system, until they came out with updates that fixed all the bugs, then it got a little better (still awful though). If you didn't do the updates, you were faced with driver problems and other issues down the road. When it comes to technology, updates are usually a good thing. Software is only as good as the person who programmed it. If they're producing updates, clearly the original software didn't meet their standards and they've found some problem areas that need addressing.

Honestly, I'd get it done. If something happens, its still under warranty, but this update is supposed to prevent future failure.
 
#12 ·
I have the 15 TH V6 tow. only 2 months old an had about 1600 miles when I took the car in to get my RRO rock rails installed. They said the car had some flash updates to be done. I never had any problems with the car but 2 days after having update check engine light came on after a little jerk on down shift. around 3 to 2nd. then car wouldn't change past forth gear but transmission would work normally again after restart. Took to dealer again after waiting 2 weeks for appointment and after 6 hours waiting they had to change Transmission control module. This was last week. Just yesterday same problem started again. Now I have to take car back to dealer!!! Do I really need an appointment and wait another 2-3 weeks or should I just go in the morning?
 
#13 ·
This was last week. Just yesterday same problem started again. Now I have to take car back to dealer!!! Do I really need an appointment and wait another 2-3 weeks or should I just go in the morning?
Considering that you were just there, they really should squeeze you in right away.

I had to have an appointment last week because of the length of time involved with the road test and learning process for the new TCM software. Kind of a pain in the butt.
 
#14 ·
Just popping in quickly.

Picked up my Cherokee from the shop.

Drove it a short distance back to work, and the shifting almost seems tighter/faster, but I still have a rough 2nd to 3rd. Lets hope it just takes some more driving to iron it out.

I'll post more when I drive more. :)
 
#15 · (Edited)
I just had a software update done today 2/4 along with new 1/2 shafts. Shifts are much smoother especially in lower gears and my wobble issue is gone. Let's hope this lasts. I posted a picture of my service ticket with parts numbers below. This email was from my Star Case manager letting me know about the update a couple of days ago.

Mr. V.

RRT# - 15-003 SYMPTOM/CONDITION: The following software enhancement, for the 948TE 9-Speed transmission, is being released to change clutch application characteristics to prevent the C-Clutch snap from dislodging. CAUTION: Both the PCM and TCM software must be updated during this procedure. Failure to do so may result in undesirable transmission shift quality. Krista Jeep Customer Care
 

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#18 ·
I think I'm in luck. That 181905A7 number appears on my transmission flash work order that was done on January 28th.
 
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#17 ·
I was waiting to see if the tranny software I got last week was the new update the press was talking about. From the above, it indeed was. In the two weeks following the update, I have observed the following: 1) shifts in general are a lot smoother across the whole range, 2) 2-3 upshift is still able to be felt except when depressing the pedal to the point where you here the engine rev (it is almost seemless with this amount of throttle input), 3) 2-1 coast downshift when car is cold is hard and causes the Cherokee to slightly hop before coming to a full stop, and 4) it is a lot better than the previous software :)


Sent from my iPhone using Tapatalk
 
#19 ·
#20 ·
Looking at the work order, I very surprised to see that the hours allotted to change out the half shafts is 0.5 each (I'm assuming per side since it's listed twice with different numbers)

I couldn't begin to swap out half shafts on my old car in a half hour, it would take that long just to get one ready to come out.....
 
#22 ·
Hi guys,

Sorry for not introducing myself in the new members section, but I wanted to jump right in this topic.

I bought a '15 Cherokee sport 4x4 in december (it has an October 2014 build date), and although I haven't had any transmission issues yet, I have experienced a few rough shifts especially when coasting, and suddenly pressing the gas pedal (like when a light turns green before you have come to a stop), as well as a slight wobble when shifting from 1-2 and 2-3 once in a while.

I called the service manager at the dealership I bought my jeep from yesterday, and the dealer today, they both checked my VIN and said that there were no transmission updates for me at this time.

I don't know what my next course of action should be. I would like to get this software update as soon sa possible if it can effect the long term durability of the transmission. The way I look at it, the more I drive it with compromised software, the more damage I am potentially doing, and the sooner it will eventually fail.
 
#23 ·
As the article says; will be notifying owner mid to end of month, so not surprised it doesn't show under your VIN. The update is out there and you can request it, like the article said.
 
#25 ·
They usually come out as TSB's (Technical Service Bulletins) and those TSB's have a number. If we had that number, you could give them that. There use to be someone on here that would post relevant TSB's but haven't seen that in some time.
 
#28 ·
Guys:

if RRT-15-003 is the trans re-flash, the directions say that BOTH the PCM and TCM software should be upgraded together. So what is the RRT number for the PCM upgrade?

Also, does this only affect I4's, or did someone with a V6 also have this done? I'm hearing it's only for the I4. Anyone Know?
 
#31 · (Edited)
Guys:

if RRT-15-003 is the trans re-flash, the directions say that BOTH the PCM and TCM software should be upgraded together. So what is the RRT number for the PCM upgrade?
I believe both are part of the RRT number.

Over on Jeep Garage they are listing just the one RRT number also.
 
#29 ·
It's for all Cherokees.

If you have a Chrysler 200, it's only for the I4.
 
#33 ·
I hope the software re-flash fixes the wobble, because the axle shafts that pveronsky had installed are the same part numbers from the 6/21/14 Star case S1421000022. Exactly the same, down to the letter suffixes AA and AB. I would think that if Jeep had re-designed the axle shafts, the part numbers would at least have AC or BC or something different, so you could tell the difference between the old replacements and the "New, New" replacements.

Did anyone get axles in the last few weeks that were supposed to be newly designed? If so, what were the part numbers?
 
#35 ·
Steve, yeah it's hard for me to say what worked for sure since I had both the axles and the new flash done at the same time. My service guy did say that the new software update should show up for any Cherokee that goes in for service. I'm curious to see results from someone who has the wobble and get's the new flash without the axles being done.
 
#36 ·
One thing I did notice is when downshifting to come to a stop, it tends to stick in 3rd gear when it normally would have been in 2nd. I'm assuming they've done this in the programming to reduce the amount of time it is in 2nd. Less time in 2nd means less to no wobble.
 
#37 ·
One thing I did notice is when downshifting to come to a stop, it tends to stick in 3rd gear when it normally would have been in 2nd. I'm assuming they've done this in the programming to reduce the amount of time it is in 2nd. Less time in 2nd means less to no wobble.
I noticed this as well. I didn't have the wobble so nothing for me to notice on that front but I can see that maybe being the reason. If I am slowing down and don't get to a full stop and start accelerating (like if the light turned green as I'm still coasting), it does downshift pretty smoothly to 2nd if it needs to though based on the limited data points I have after 1 and a half days. :)
 
#41 ·
I'll be posting my experience for sure. Its very hard to tell if the wobble is there currently, as the colder it is the less wobble there is. And it is usually more noticeable when the vehicle is under load/stress (aka going up a hill from a standing stop, or have a car load of people). I did notice a wobble yesterday, but I could have been the cause (I floored it to change lanes), and its still in the quick learn stage, so its hard to tell if there is any difference or not.

I'm supposed to be picking my Jeep up today. It's getting the "new specially designed" half shafts, and the transmission flash. My work order looks just like pveronsky's. I told them I want an answer to why the Jeeps that wobble need special parts, there has to be an answer. Nobody seems to be able to give me the answer. If they need special parts they have to be compensating for another problem, or the half shafts would be interchangeable.
They aren't "specially designed". They're the same product number and part, just recently manufactured and manufactured better. The old ones were said to be "warped", which is why they caused the vehicle to wobble at certain RPM's. The new ones are, hopefully, not warped like the old ones were.
 
#48 · (Edited)
I spoke to my dealer today and asked about the new update and he said there are NO updates for the 2015 V6 Cherokees only for the 2.4.
 
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