10-19-2018, 03:25 PM | #1 |
Drives: Yellow 2018 SS Join Date: Jun 2011
Location: South FL
Posts: 114
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Tunning TCM for shudder fix
I've been doing a lot of reading on the shudder and possible fixes, I've seen a lot of posts claiming that tunning the transmission to remove the slip that it's programmed to do will fix the dreaded shudder, and that makes sense.
My question is, has anyone who had the shudder got a tune on the TCM and is completely free of the shudder? I'm looking for actual people who did this and got any sort of result whether it went away or didn't. I'm looking to tune my TCM to get rid of the shudder but only want to lose my warranty if it actually works and is permanent. Thanks guys. |
10-19-2018, 03:53 PM | #2 |
CamaroFans.com
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You can get a brand new TC with your current warranty.
Not sure why you would want to take the chance by tuning. Even if someone does come in here and say it's a fix, then why wouldn't GM just flash the tune for a fix. |
10-19-2018, 05:42 PM | #3 |
Drives: 17 SS a8 Join Date: Feb 2010
Location: omaha
Posts: 1,678
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For those of us tuning for mods already it might make sense. My car developed the shudder after I had done a few minor mods. I choose to just fix it myself rather than risk getting flagged as modified. I would have loved to have had a tuning solution back then.
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dropped a valve in the 6.2. now running a drop in rods and piston 5.3
best et 5.83@121 with the 5.3 http://www.camaro6.com/forums/showthread.php?t=465472 |
10-19-2018, 05:43 PM | #4 | |
Drives: Yellow 2018 SS Join Date: Jun 2011
Location: South FL
Posts: 114
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Quote:
From my understanding, even with a new TC the problem will come back. As the issue isn't the TC as much as it is the programming of slip in 7-8 gear. Did I get that wrong? Also I've been using a range device to keep my car out of v4 mode, in an effort to reduce as much wear on the transmission/TC as possible. It definitely helped but it still happens, albeit less often. |
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10-19-2018, 06:07 PM | #5 | |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,800
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Quote:
My guess is if the EPA found out the GM was reprogramming these SS A8 cars so AFM and the slip tables were disabled, there might be some hefty fines because this reduces fuel mileage a bit by 1-2mpg.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
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10-19-2018, 08:51 PM | #6 |
Drives: 17 SS a8 Join Date: Feb 2010
Location: omaha
Posts: 1,678
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the tuning fix I am aware of just reduces tcc slip to 0. it has nothing to do with 4cyl mode and shouldn't effect mpg.
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dropped a valve in the 6.2. now running a drop in rods and piston 5.3
best et 5.83@121 with the 5.3 http://www.camaro6.com/forums/showthread.php?t=465472 |
10-20-2018, 01:24 AM | #7 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,800
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I know what the tuning fix is...I did mine a while ago. You are correct setting the slip tables to 0 doesn't effect mpg, but turning off AFM does. AFM should also be turned off from what I was told that is why I tied it in with my last post. Anyhow, my tcm is tuned, afm is off and I have no converter shudder.
__________________
2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
10-20-2018, 09:37 AM | #8 | ||
CamaroFans.com
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Thanks for the info and not discounting anything you've said but is there any bulletin or something that has this in writing? I see I need to do some digging around to get current on this one. |
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10-20-2018, 10:34 AM | #9 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,800
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https://www.camaro6.com/forums/showthread.php?t=540478
https://www.camaro6.com/forums/showp...3&postcount=92 https://www.camaro6.com/forums/showp...&postcount=154
__________________
2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
10-20-2018, 12:53 PM | #10 | |
Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016
Location: Norman, OK
Posts: 2,424
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Quote:
Used to be we found if the tables were zero'd out we got a slight increase in gas mileage but at the cost of feeling the converter lock up. That is the only reason I see GM allows the slip now, it is like they dont want you to feel any of the shifts or the converter locking up at all.
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2019 Corvette Z06 2LZ A8 - Halltech CAI, AWE non-catted X-pipe, Mamo V2 ported TB 592rwhp, bone stock 566rwhp
2017 Camaro SS 1LE - Procharger D1SC w/ Tial 2" BOV & Race intercooler / ARH full length catless headers / Alky meth injection system - 650rwhp on conservative tune SOLD |
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10-20-2018, 01:31 PM | #11 | |
Drives: 17 SS a8 Join Date: Feb 2010
Location: omaha
Posts: 1,678
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Quote:
__________________
dropped a valve in the 6.2. now running a drop in rods and piston 5.3
best et 5.83@121 with the 5.3 http://www.camaro6.com/forums/showthread.php?t=465472 |
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10-20-2018, 01:35 PM | #12 | ||
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,800
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__________________
2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
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10-20-2018, 02:43 PM | #13 |
CamaroFans.com
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10-20-2018, 02:52 PM | #14 | |
Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016
Location: Norman, OK
Posts: 2,424
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Quote:
Thanks King, I am going to play with this tables later this week on my truck then. Have either of you played around with the pressure offset tables and in increasing the pressure? I saw that we just got access to those tables with the most recent HPT update.
__________________
2019 Corvette Z06 2LZ A8 - Halltech CAI, AWE non-catted X-pipe, Mamo V2 ported TB 592rwhp, bone stock 566rwhp
2017 Camaro SS 1LE - Procharger D1SC w/ Tial 2" BOV & Race intercooler / ARH full length catless headers / Alky meth injection system - 650rwhp on conservative tune SOLD |
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