Triple Flush for trans problem. Does it work.
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Intermediate
Joined: May 2020
Posts: 49
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From: St. Louis area
Triple Flush for trans problem. Does it work.
Well I see now that there's lawsuit out against GM for our crummy 8 speed auto trans. And I heard GM won't warranty the problem. My 2016 Z51 bought used has started to do the shedder just after 10000 miles. Doesn't do it often, but does do it. If I drive in manual or paddle shift it you never feel it. I was wondering does the triple flush correct the problem, or am I just wasting my money? And what is the cost? I bought the car use with 8200 on it. And the dealer gave my a life time warranty on the power train. I guess we will find out if that's any good.
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Apr 17, 2022, 09:24 PM
Moderator emeritus
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
True, the range will hide the symptom but the triple flush will correct the problem. I'd rather fix the problem than hide the problem.
Elmer
Elmer
Drifting
Joined: Oct 2005
Posts: 1,331
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From: Appleton Wisconsin
Yeah it works, go to a Chevy dealer and talk to a service representative they might do it for free it depends on the dealer.
I have a 16 that they did last year and I wasn’t charged anything.
I have a 16 that they did last year and I wasn’t charged anything.
Melting Slicks
Joined: Aug 2007
Posts: 3,213
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From: Indianapolis IN
If you are not experiencing it that often, you might try using the Ranger AFM/DFM Disabler. This will keep your car running with 8cyls. all the time. You won't feel it in manual mode, but you will feel it more often in auto when you're going from 8 to 4 cyls. You can find out more by doing a search in this forum.
Moderator emeritus
Joined: Jun 2001
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
True, the range will hide the symptom but the triple flush will correct the problem. I'd rather fix the problem than hide the problem.
Elmer
Elmer
Burning Brakes
Joined: Jul 2017
Posts: 1,130
Likes: 617
From: Houston Texas
If you are not experiencing it that often, you might try using the Ranger AFM/DFM Disabler. This will keep your car running with 8cyls. all the time. You won't feel it in manual mode, but you will feel it more often in auto when you're going from 8 to 4 cyls. You can find out more by doing a search in this forum.
I've heard and do remove the Range before going to the dealer, some have reported the dealer was not happy finding them plugged into the car.
Team Owner
Joined: Sep 2010
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Well I see now that there's lawsuit out against GM for our crummy 8 speed auto trans. And I heard GM won't warranty the problem. My 2016 Z51 bought used has started to do the shedder just after 10000 miles. Doesn't do it often, but does do it. If I drive in manual or paddle shift it you never feel it. I was wondering does the triple flush correct the problem, or am I just wasting my money? And what is the cost? I bought the car use with 8200 on it. And the dealer gave my a life time warranty on the power train. I guess we will find out if that's any good.
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I would go ahead and get the triple flush done - reports are that it works. See if the dealer will either do the flush at no cost or at a reduced rate. I would also consider getting the Range AFM Eliminator - will keep the car out of V4 mode all the time.
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From: Santa Fe Tx
Well I see now that there's lawsuit out against GM for our crummy 8 speed auto trans. And I heard GM won't warranty the problem. My 2016 Z51 bought used has started to do the shedder just after 10000 miles. Doesn't do it often, but does do it. If I drive in manual or paddle shift it you never feel it. I was wondering does the triple flush correct the problem, or am I just wasting my money? And what is the cost? I bought the car use with 8200 on it. And the dealer gave my a life time warranty on the power train. I guess we will find out if that's any good.
1. GM had the wrong transmission fluid when A8 was originally intro'd. They have switched now with a triple flush.
2. GM invented AFM which is a shitty system. This takes your engine from 8cyl to 4cyl. with no way to turn it off. You can install a range device which eliminates AFM operation. I found that this switching from 8 to 4 mimic'd the shudder. so Range eliminated this. Much more enjoyable to drive.
Instructor
Joined: Sep 2018
Posts: 135
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From: Alabama
I respect that Elmer and agree but I have had a Range on since new (almost 4 years) and everything works perfect. I’m not willing to gamble bringing my car in for the flush and having the tech jack something up or damage my car. I don’t want to be telling myself “I should have left it alone!”. Perhaps I’m a bit OCD but why gamble. I’m fortunate as I’ve never been to Service Department….yet.
Drifting
Joined: Mar 2011
Posts: 1,251
Likes: 343
From: Louisville KY
My 2016 started shuddering last year. I called the dealer and told them what was happening and that I needed the triple flush. They set me up with an appointment for the next week. They performed the triple flush and told me if I had any more problems, to call them. I have not had any more shudder problems at all. They did not charge me anything.
Racer
Joined: Jan 2020
Posts: 426
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From: Boston
I’d recommend anyone who buys a used C7 to replace the trans filter. It will get you 100% new fluid and a filter and it cost about 600 bucks. I’ll try to find the actual cost in my paperwork but to guarantee that the fluid is gone and no more build debris in the A8, it’s a small price to pay IMO. I did it with a new 2019 GS A8 built after the Feb fluid fix and it has gotten rid of all hard cold shifts. I intend to keep this car a long while and track it. I never had a shudder but I did have the hard cold shift from R to D until I did the fluid change.
I will never do a flush going forward. Only trans filter changes to preserve the mechanics of the A8 while I track it.
I’ve had a range device on the car since about mile 100 on the odo. Did the fluid change and filter in Year two after about 1500 miles
I will never do a flush going forward. Only trans filter changes to preserve the mechanics of the A8 while I track it.
I’ve had a range device on the car since about mile 100 on the odo. Did the fluid change and filter in Year two after about 1500 miles
Last edited by ShadyVette; Apr 18, 2022 at 03:00 PM.
Pro
Joined: Nov 2021
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From: Kannapolis, NC
Well I see now that there's lawsuit out against GM for our crummy 8 speed auto trans. And I heard GM won't warranty the problem. My 2016 Z51 bought used has started to do the shedder just after 10000 miles. Doesn't do it often, but does do it. If I drive in manual or paddle shift it you never feel it. I was wondering does the triple flush correct the problem, or am I just wasting my money? And what is the cost? I bought the car use with 8200 on it. And the dealer gave my a life time warranty on the power train. I guess we will find out if that's any good.
Melting Slicks
Joined: Aug 2007
Posts: 3,213
Likes: 397
From: Indianapolis IN
I respect that Elmer and agree but I have had a Range on since new (almost 4 years) and everything works perfect. I’m not willing to gamble bringing my car in for the flush and having the tech jack something up or damage my car. I don’t want to be telling myself “I should have left it alone!”. Perhaps I’m a bit OCD but why gamble. I’m fortunate as I’ve never been to Service Department….yet.
Heel & Toe
Joined: Jan 2022
Posts: 16
Likes: 5
From: Ohio
Well I see now that there's lawsuit out against GM for our crummy 8 speed auto trans. And I heard GM won't warranty the problem. My 2016 Z51 bought used has started to do the shedder just after 10000 miles. Doesn't do it often, but does do it. If I drive in manual or paddle shift it you never feel it. I was wondering does the triple flush correct the problem, or am I just wasting my money? And what is the cost? I bought the car use with 8200 on it. And the dealer gave my a life time warranty on the power train. I guess we will find out if that's any good.
Had the same problem on my 2017 GMC Sierra and the flush fixed that too. Best of luck Tankerx!
Race Director
Joined: Apr 2017
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From: Virginia
I respect that Elmer and agree but I have had a Range on since new (almost 4 years) and everything works perfect. I’m not willing to gamble bringing my car in for the flush and having the tech jack something up or damage my car. I don’t want to be telling myself “I should have left it alone!”. Perhaps I’m a bit OCD but why gamble. I’m fortunate as I’ve never been to Service Department….yet.
Moderator emeritus
Joined: Jun 2001
Posts: 18,599
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
I respect that Elmer and agree but I have had a Range on since new (almost 4 years) and everything works perfect. I’m not willing to gamble bringing my car in for the flush and having the tech jack something up or damage my car. I don’t want to be telling myself “I should have left it alone!”. Perhaps I’m a bit OCD but why gamble. I’m fortunate as I’ve never been to Service Department….yet.
ELmer
Team Owner
Joined: Jul 2004
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From: Hartford WI
