TSB - Shift improvements for 2014 3.0L Diesel (Feb 28/2015) - Page 2 - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > 2014+ Jeep Grand Cherokee Ecodiesel 3.0

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #13  
Old 03-07-2015, 08:47 PM
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Nov 2012
Location: Perth, Western Australia
Posts: 177
Thanks: 18
Thanked 9 Times in 8 Posts
Rep Power: 1705
noons is on a distinguished road
Re: TSB - Shift improvements for 2014 3.0L Diesel (Feb 28/2015)

My shifting is horrible and has been so for the past year.

During slow acceleration from a stand still I get excessive engine braking when releasing the throttle a little - makes for a very jerky ride.

Has also ruined my fuel economy. I get 11L/100km or 21 mpg around town.

I really hope this fixes it..

Love the diesel but

__________________
Written Off - 2013 Jeep Grand Cherokee Limited CRD, Brilliant Black
Current - 2014 Jeep Grand Cherokee Limited CRD, Billet
Reply With Quote
Sponsored Links
Advertisement
 
  #14  
Old 03-08-2015, 01:48 AM
Senior Member
 
Join Date: Sep 2013
Posts: 1,312
Thanks: 49
Thanked 164 Times in 132 Posts
Rep Power: 2884
Roadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond repute
Quote:
Originally Posted by noons View Post
My shifting is horrible and has been so for the past year.
Haha, there's normal horrible and then there's "Jeep horrible". Does your Jeep lurch when it shifts 2-1? As in "holy crap, I just got rear-ended!"? I had that fixed by the late August 2014 flash (it worked for that).

Quote:
During slow acceleration from a stand still I get excessive engine braking when releasing the throttle a little - makes for a very jerky ride.
Please let me know if you ever get this fixed. Or start a new thread for others like us... this EcoDiesel has the most engine braking of any vehicle I've ever driven.

EcoDiesel: "Oh, so you want to go down a steep grade at 35 mph? Well, you better step on the accelerator if you don't want to lose speed."

I often shift into N to avoid that kind of engine braking and to be able to coast.

Quote:
Has also ruined my fuel economy. I get 11L/100km or 21 mpg around town.
I'm getting 13-15L/100 km around town now that it's a bit warmer.
Reply With Quote
  #15  
Old 03-08-2015, 03:52 AM
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Nov 2012
Location: Perth, Western Australia
Posts: 177
Thanks: 18
Thanked 9 Times in 8 Posts
Rep Power: 1705
noons is on a distinguished road
Re: TSB - Shift improvements for 2014 3.0L Diesel (Feb 28/2015)

Quote:
Originally Posted by Roadkill View Post
Haha, there's normal horrible and then there's "Jeep horrible". Does your Jeep lurch when it shifts 2-1? As in "holy crap, I just got rear-ended!"? I had that fixed by the late August 2014 flash (it worked for that).
Haha yep, exactly that. Like I've been booted by a horse.

Quote:
Please let me know if you ever get this fixed. Or start a new thread for others like us... this EcoDiesel has the most engine braking of any vehicle I've ever driven.
It was never this bad. Seems to be getter worse over time. I think it's learning algorithm is screwed.

Quote:
I'm getting 13-15L/100 km around town now that it's a bit warmer.
Bloody hell, that's horrible! Might as well have gone the hemi with those figures!


I'm due for the 40k service in the next month, so when that happens I'll be sure to kick up a stink about it with the dealer.
__________________
Written Off - 2013 Jeep Grand Cherokee Limited CRD, Brilliant Black
Current - 2014 Jeep Grand Cherokee Limited CRD, Billet
Reply With Quote
  #16  
Old 03-08-2015, 07:41 AM
Jeep_GC's Avatar
Member
My Jeep: 2015 3.0L WK2
 
Join Date: Sep 2014
Location: S. Ontario, Canada
Posts: 334
Thanks: 85
Thanked 28 Times in 24 Posts
Rep Power: 1206
Jeep_GC is on a distinguished road
Re: TSB - Shift improvements for 2014 3.0L Diesel (Feb 28/2015)

Quote:
Originally Posted by noons View Post
Bloody hell, that's horrible! Might as well have gone the hemi with those figures!
I spoke with a member earlier this yr who got the hemi this winter (cold climate) and he was seeing around 20l/100kms so the diesel still isn't looking too bad in this one
__________________
2015 Overland 4x4 EcoDiesel
Reply With Quote
  #17  
Old 03-11-2015, 09:29 PM
Goohead's Avatar
Member
 
Join Date: Feb 2015
Posts: 56
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 758
Goohead is on a distinguished road
Re: TSB - Shift improvements for 2014 3.0L Diesel (Feb 28/2015)

Just got this done, wow big difference for city driving, only concerns was did they lower line pressure to achieve this
Reply With Quote
  #18  
Old 03-12-2015, 12:42 AM
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Nov 2012
Location: Perth, Western Australia
Posts: 177
Thanks: 18
Thanked 9 Times in 8 Posts
Rep Power: 1705
noons is on a distinguished road
Re: TSB - Shift improvements for 2014 3.0L Diesel (Feb 28/2015)

Glad to hear yours is much better.
I'll report back when I get mine done.
__________________
Written Off - 2013 Jeep Grand Cherokee Limited CRD, Brilliant Black
Current - 2014 Jeep Grand Cherokee Limited CRD, Billet
Reply With Quote
  #19  
Old 03-12-2015, 06:55 AM
Senior Member
 
Join Date: Sep 2013
Posts: 1,312
Thanks: 49
Thanked 164 Times in 132 Posts
Rep Power: 2884
Roadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond repute
Quote:
Originally Posted by Goohead View Post
Just got this done, wow big difference for city driving, only concerns was did they lower line pressure to achieve this
What was your previous TCM flash version? Conversely, if you are certain your never applied a TCM flash before, then when was your vehicle manufactured?
Reply With Quote
  #20  
Old 03-12-2015, 07:51 AM
jaje's Avatar
Member
 
Join Date: May 2014
Posts: 309
Thanks: 6
Thanked 52 Times in 38 Posts
Rep Power: 1298
jaje is on a distinguished road
Re: TSB - Shift improvements for 2014 3.0L Diesel (Feb 28/2015)

Quote:
Originally Posted by Roadkill View Post
My point was tongue in cheek, because if the update flash doesn't "fix" anything the owner wants to have "fixed", why would they get it?

I learned my lesson after flashing a BIOS update on a motherboard. My machine had no issues but hey, "latest and greatest", right? The firmware update broke compatibility with my video card and the motherboard utility didn't allow downgrades. Eventually I had to have the motherboard physically replaced with a new one flashed to the previous BIOS revision and I never touched it again. Same scenario pertains to firmware updates for my Jeep. Obviously others have a more aggressive approach to updates. That's great... they can find the bugs for the rest of us, like, say, if the update hurts fuel economy or something.

BTW, Eco mode persistence does work for you now, right? That was the only official change. However, I'm not at all convinced that was the sole difference.

I'm trying to decide if I will gamble on getting the Eco mode memory feature vs the risk of causing new issues when I don't really have any at the moment. Now, if this update had a "seat ventilation mode memory" feature then I would be beating on the service garage door at 0500 (haha).
Not to be a devil's advocate but Jeep has 100% control over the drivers and previous revisions that any current ECU reflash would affect. The only other way I see this happening is if the Tech screwed up and didn't do a full reflash to the instructions or you had aftermarket tuning. OTOH your motherboard issue would easily be an issue b/c the OEM of that motherboard had no control over the millions of modifications you can do to your PC by third parties (and they have drivers within drivers). Unfortunately you couldn't backup the previous version and go back.
__________________
'14 XV Crosstrek
#74 Exomotive Exocet NASA ST3 / E0
'14 WK2 EcoDiesel (replaces '07 WK CRD)
Reply With Quote
  #21  
Old 03-12-2015, 08:09 AM
Senior Member
 
Join Date: Sep 2013
Posts: 1,312
Thanks: 49
Thanked 164 Times in 132 Posts
Rep Power: 2884
Roadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond repute
Quote:
Originally Posted by jaje View Post
Unfortunately you couldn't backup the previous version and go back.
...which is exactly the same scenario as a flash from Chrysler. Once the flash is applied there is no way to downgrade if the flash causes problems.

There have been enough reports on various fora to reject the assertion that these vehicles are homogenous and interchangeable. Hell, this is implicit in the TSBs as they indicate they are designed to address issues that *some* owners are experiencing. Ipso facto, if only some owners experience issues in the first place it stands to reason that the flash may cause oddities for other owners.

Would I apply this patch without hesitation if I could roll back to the previous revision in case of issues? Absolutely, especially if I could do so in my own garage via uConnect-type flash up/downgrade. As it stands, the TCM flash is irrevocable and is therefore a risk.

Risk vs reward would favor applying the flash if I had issues that the upgrade specifically addressed. As it stands, this is nothing more than "how badly do I want Eco Mode persistence vs the risk of causing new problems?"
Reply With Quote
  #22  
Old 03-14-2015, 10:34 PM
Goohead's Avatar
Member
 
Join Date: Feb 2015
Posts: 56
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 758
Goohead is on a distinguished road
Re: TSB - Shift improvements for 2014 3.0L Diesel (Feb 28/2015)

Quote:
Originally Posted by Roadkill View Post
What was your previous TCM flash version? Conversely, if you are certain your never applied a TCM flash before, then when was your vehicle manufactured?

Looked up vehicle Maintance history since I purchased a new 14 leftover with 100 miles on it, no flash, don't know the exact date but guessing early 14 or late 13.

So far no issues, low gear downshift clunk is gone.

Like I said they probably just lowered line pressure during partial throttle. I was just concerned that line pressure would also be reduced during open loop or sport mode. I doubt the flash would introduce more problems. From an engineering stand point it would be inefficient to make new maps from scratch when you can just tweet the existing map for shift points, line pressure, etc. I think your safe to be honest.

Never been a zf fan since I blew up 2x transmission in my tial s4 but this one and the one in my coyote mustang has been pretty good.
Reply With Quote
  #23  
Old 03-17-2015, 09:37 AM
Member
 
Join Date: Feb 2014
Posts: 101
Thanks: 3
Thanked 6 Times in 4 Posts
Rep Power: 1183
sc32valve is on a distinguished road
Re: TSB - Shift improvements for 2014 3.0L Diesel (Feb 28/2015)

Had the flash done while my truck was in the shop last week for front wheel bearings. I have to say there is a noticeable improvement, especially when on cruise control. Never had any of the low speed problems people are talking about. This was my 2nd transmission flash.
__________________
2014 Grand Cherokee Overland EcoDiesel - Granite/Black (~18k) miles (Lemon), ORA II, Adv. Tech
2016 Grand Cherokee Overland EcoDiesel - Billet/Black, ORA II, Adv. Tech (on order)
Reply With Quote
  #24  
Old 03-17-2015, 12:23 PM
Senior Member
 
Join Date: Sep 2013
Posts: 1,312
Thanks: 49
Thanked 164 Times in 132 Posts
Rep Power: 2884
Roadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond repute
Quote:
Originally Posted by sc32valve View Post
This was my 2nd transmission flash.
Thanks for reporting in. However the question is whether this latest flash adds anything except Eco Mode persistence. Was your first flash of the next most recent TCM release, i.e. the one that came out at the end of August 2014?

Based on the TSB, it would seem that the Aug 2014 TCM flash update had various shift fixes, but the Feb 2015 release simply adds Eco Mode persistence in addition to the fixes in the August 2014 release.
Reply With Quote
Reply

Tags
2014, 2015

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2014 CRD + 8-speed: MAJOR shift enhancements/improvements 08/27/14 Milous Trouble Shooting/Problems/Service 85 11-28-2016 12:16 AM
New TSB - MAJOR shift enhancements/improvements 08/27/14 netboy 2014+ Jeep Grand Cherokee Ecodiesel 3.0 18 09-05-2014 12:37 PM
Feb. 2014....BEST Feb. sales month ever for Jeep Scottina06 Jeep/Chrysler/Fiat news, spy shots and more! 2 03-04-2014 02:24 PM
Tire improvements? 2003grandcherokee Wheels/Tires/Brakes 6 12-04-2010 06:41 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 09:38 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.