Newest TCM flash. Don't get it if you're not having issues - Page 2 - Jeep Garage - Jeep Forum

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  #13  
Old 09-25-2014, 09:07 AM
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Re: Newest TCM flash. Don't get it if you're not having issues

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Originally Posted by 2009RavenR1 View Post
I can't even hold a moderate hill like I used to. Making my purchase of a diesel completly useless. Beyond pissed at Jeep.

You are mighty quick to blame the update and the vehicle. Given the almost uniformly negative content to your postings, in this thread and others, I seriously question your objectivity and reliability to dispense advice in a controlled and unbiased manner. Perhaps a simpler explanation, but not one that would give you yet another opportunity to vent your spleen at Chrysler designers and programmers, is that your dealer didn't read the TSB carefully enough and reflexively erased your TCM's memory after the update--the previous recommended protocol--and your Jeep is now relearning your shift points. This would explain what you are observing.

I had the update performed and reminded my dealer not to erase the memory. I have noted improved shifting at lower gears and no discernible mileage declines. I think it is a good and worthwhile update.

You obviously hate your Jeep and want any reason to get rid of it. It is understandable given all of your problems. But in light of your obvious bias, perhaps you aren't the best person to provide advice to people who like me want to keep their Jeeps and are trying to make the best out of their purchases despite some unfortunate issues.


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  #14  
Old 09-25-2014, 11:52 AM
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Re: Newest TCM flash. Don't get it if you're not having issues

If ANYONE should be mad at Jeep, it is me. 62 days straight without my Jeep and 76 days to resolution.

My take on the TSB is that it does shift at a slightly higher rpm especially when the trans temp is cold, avoids lugging by downshifting a little easier, and modulates the lockup converter for a more gradual engagement. It fixed my shudder. My mpg seems to be about the same too...but my elevation changes are rarely more than 100 feet in my region.

Raven is pretty knowledgable...just not very tactful. I wish him the best and hope his demeanor doesn't hinder his efforts on a buy back or lemon law.
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Old 09-25-2014, 12:12 PM
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Re: Newest TCM flash. Don't get it if you're not having issues

Quote:
Originally Posted by JEB1 View Post
You are mighty quick to blame the update and the vehicle. Given the almost uniformly negative content to your postings, in this thread and others, I seriously question your objectivity and reliability to dispense advice in a controlled and unbiased manner. Perhaps a simpler explanation, but not one that would give you yet another opportunity to vent your spleen at Chrysler designers and programmers, is that your dealer didn't read the TSB carefully enough and reflexively erased your TCM's memory after the update--the previous recommended protocol--and your Jeep is now relearning your shift points. This would explain what you are observing.

I had the update performed and reminded my dealer not to erase the memory. I have noted improved shifting at lower gears and no discernible mileage declines. I think it is a good and worthwhile update.

You obviously hate your Jeep and want any reason to get rid of it. It is understandable given all of your problems. But in light of your obvious bias, perhaps you aren't the best person to provide advice to people who like me want to keep their Jeeps and are trying to make the best out of their purchases despite some unfortunate issues.


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Or don't listen to me.. there in no objectivity in facts, but whatevs
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  #16  
Old 09-25-2014, 12:51 PM
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Re: Newest TCM flash. Don't get it if you're not having issues

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Originally Posted by 2009RavenR1 View Post
Or don't listen to me.. there in no objectivity in facts, but whatevs

Indeed, facts are facts. So provide the facts. Leave out the whining and hyperbole. It's bringing me down. I suspect it's bringing other people down, too. You have avenues for getting redress. I join ExcusionDiesel in wishing you luck in pursuing them.


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  #17  
Old 09-25-2014, 02:45 PM
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Re: Newest TCM flash. Don't get it if you're not having issues

How TCM software update can affect ECM aka PCM?
Only thing that can be done is to change shifting rpm and torque convertor lookup rpm. I also noticed like excursiondiesel little increasing in shifting rpm with the new TCM software applied and so far so good.
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  #18  
Old 09-25-2014, 02:47 PM
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Re: Newest TCM flash. Don't get it if you're not having issues

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Originally Posted by isstay View Post
How TCM software update can affect ECM aka PCM?
Only thing that can be done is to change shifting rpm and torque convertor lookup rpm. I also noticed like excursiondiesel little increasing in shifting rpm with the new TCM software applied and so far so good.
The tcm commands tq reduction via the ecm. Tcm has talked with the ecm and controlled power output since the early 2000s
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  #19  
Old 09-25-2014, 10:40 PM
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Re: Newest TCM flash. Don't get it if you're not having issues

Attached video
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  #20  
Old 09-25-2014, 11:03 PM
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Re: Newest TCM flash. Don't get it if you're not having issues

New tcm flash: http://youtu.be/DpWF0qJNU5c

This should work. Watch the speedo and the gears. This hill isn't very big either.
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  #21  
Old 09-25-2014, 11:05 PM
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Re: Newest TCM flash. Don't get it if you're not having issues

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Originally Posted by 2009RavenR1 View Post
New tcm flash: YouTube

This should work. Watch the speedo and the gears. This hill isn't very big either.
Comes up as "private video" for me.
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  #22  
Old 09-25-2014, 11:07 PM
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Re: Newest TCM flash. Don't get it if you're not having issues

I'll try changing it when I get to work
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  #23  
Old 09-26-2014, 09:41 AM
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Re: Newest TCM flash. Don't get it if you're not having issues

I can confirm I am also noticing a loss in mpg. I went from getting 28mpg on the interstate to 24mpg. I am now getting 17mpg in the city.....

Called dealership and they said it is not undo-able and that I'll have to call Chrysler corporate to get anything done.
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  #24  
Old 09-27-2014, 01:15 PM
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Re: Newest TCM flash. Don't get it if you're not having issues

Is anyone else noticing less mpg with this flash? Would it only be noticible in more hilly areas?

Would assume its more responsive on takeoff now?

Would this update also be included in any new 2015 builds?

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