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  #13  
Old 08-03-2015, 04:24 AM
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Re: Grand cherokee2015 gear issue

Quote:
Originally Posted by Eugene The Jeep View Post
My biggest issue is the upshift hesitation between 1-2 or 2-3. I think I've figured out when it will do it. As silly as it sounds, if the road is even slightly inclined (and I do mean slightly) , and you are traveling on the downslope, the transmission will get confused because it wants to downshift while you are trying to upshift, hence the hesitation. It usually happens to me at stop signs. Here in Los Angeles, a lot of streets dip at intersections. So when I stop at the intersection and then go forward, the car is slightly tilted downhill for a split second where paving intersects the cross street. I assume that that downhill motion makes the transmission want to downshift, when I'm trying to accelerate.


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I have only between the 1-2 this slight jerk happen only when I take my foot of the gas. If I'm pressing normal it doesn't have this slight jump

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  #14  
Old 08-03-2015, 04:38 AM
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Re: Grand cherokee2015 gear issue

I have a jerk when coming to a stop at 2-1. Then a lot of times if I come to a brief stop it tries to start out in second gear, even with Eco off. Ugh
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  #15  
Old 08-03-2015, 01:58 PM
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Re: Grand cherokee2015 gear issue

This transmission issue is really making me crazy I just got the car what thw hell and when I go to the agency they tell me there is nothing wrong all working great and no problems at all... it runs great but this 1-2 is making me nuts
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  #16  
Old 08-03-2015, 08:31 PM
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Re: Grand cherokee2015 gear issue

Demm0,

How many miles are on the car?


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  #17  
Old 08-03-2015, 08:32 PM
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Re: Grand cherokee2015 gear issue

Or I should say kilometers


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  #18  
Old 08-03-2015, 08:38 PM
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Re: Grand cherokee2015 gear issue

Got the jeep back today and they just "cleared adaptive and quick learn transmission." AKA just reset it, which I could have done by detaching the battery the tech said there were no errors at all in the computer and it should be working as intended now. Drives fantastic just cruising home from work and the rough upshift is gone... With that said, this is the exact same thing they did last time along with a transmission software update and after a month it came back. So we will see....

I didn't get to ask them about a firmware version or anything for the transmission update, sorry. The tech who worked on my car had left for the day when I got there after work and there is nothing like that on the service invoice.
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  #19  
Old 08-03-2015, 10:02 PM
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Re: Grand cherokee2015 gear issue

Crimson, do you drive in Eco on or Eco off? The reason I ask is because apparently if you switch back and forth for the first 1000 mi or so after the reset, you're going to create the same problem again


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  #20  
Old 08-03-2015, 10:27 PM
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Re: Grand cherokee2015 gear issue

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Originally Posted by CrimsonKing View Post
Got the jeep back today and they just "cleared adaptive and quick learn transmission." AKA just reset it, which I could have done by detaching the battery
There's a bit more to it, if they clear the memory in the trans they should also be completing the quick learn procedure:

http://www.wk2jeeps.com/tsb/tsb_wk2_2101214b.pdf

Hopefully they did!
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  #21  
Old 08-03-2015, 11:50 PM
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Re: Grand cherokee2015 gear issue

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Originally Posted by Eugene The Jeep View Post
Or I should say kilometers


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1068 km

---------- Post added at 03:50 AM ---------- Previous post was at 03:41 AM ----------

I think they did the same thing with me they just reset the car it's smooth now but still I'll keep monitoring the transmission... also I believe when the Trans temp is over 80 c it works well with me smoother . Did u monitor this guy's ?
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  #22  
Old 08-04-2015, 08:48 AM
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Re: Grand cherokee2015 gear issue

Quote:
Originally Posted by Benn0 View Post
There's a bit more to it, if they clear the memory in the trans they should also be completing the quick learn procedure:

http://www.wk2jeeps.com/tsb/tsb_wk2_2101214b.pdf

Hopefully they did!
Hmm was not aware of the full extent of the reset. Thanks for info! Not sure if they ended up doing that? The invoice just has what I quoted up there. I'll have to look into it..


And to answer above, I have kept the ECO off for now. Really haven't messed with it at all since I purchased the car.
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  #23  
Old 08-04-2015, 09:10 AM
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Re: Grand cherokee2015 gear issue

Quote:
Originally Posted by Eugene The Jeep View Post
Not sure. But apparently disconnecting the battery yields the same results as one of these software flashes, so I question the effectiveness of the update. All it does it clear the shifting data that's been stored in the car's computer
That's not necessarily true. The battery disconnect solves some problems but generally not the harsh transmission up and downshifts. You may feel an initial improvement but the harsh shifting always returns.

Early on with the 14's there were some software updates but the only one today that seems to have the highest rate of success is the adaptive relearn procedure. If that doesn't solve the problem then the next order of attempting a fix is to replace the valve body, followed by replacing the transmission. There are countless threads and thousands of posts here on this subject. Everyone who's dealt with a transmission problem has reported varying amounts of success with each of these procedures... with some having no success at all and ending up getting a buyback from FCA.

I had an issue early on with my 14 where I'd be cruising in 8th gear and having it downshift to 7th when climbing up a hill or slight grade... exactly what it's supposed to do. But when I leveled off, the transmission wouldn't return to 8th gear, it would stay in 7th for several miles before upshifting back into 8th. A software update fixed that problem.

Later on it developed the harsh 3-4 upshift and 2-1 downshift issue. I had the adaptive relearn procedure applied. It immediately solved the harsh upshifting but did nothing for the harsh downshifting. After I put 300-350 miles on it the harsh downshifting simply disappeared one day and I haven't had a shifting problem since in the last 9000+ miles of driving.

Since this is a relearn procedure, don't expect an immediate fix to shifting issues. You need to give it a chance to relearn and that may take a few hundred miles, as it did in my case. If you still have the problem after that then the next thing your dealer will do is replace the transmission valve body. You don't get to jump right to a complete transmission replacement until the valve body replacement is proven not to solve the problem.
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  #24  
Old 08-04-2015, 05:25 PM
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Re: Grand cherokee2015 gear issue

Hopefully after a couple of 100 miles the car will freakin learn how to shift right
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