C7 General Discussion General C7 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

Triple Flush

Thread Tools
 
Search this Thread
 
Old Apr 12, 2026 | 07:52 PM
  #1  
Kingman99's Avatar
Kingman99
Thread Starter
Melting Slicks
20 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Mar 2003
Posts: 2,928
Likes: 55
From: Port Saint Lucie, Florida
Default Triple Flush

Hi
2016 auto

How can l tell if I have had a triple flush?

My car also runs on 8 cylinders all the time. I do have the range device but it’s not plugged in.

any ideas?

the person who sold me the car gave it to me but had no clue what it was. The place where the range should
be was empty.

Any thoughts?
Reply
Old Apr 12, 2026 | 08:15 PM
  #2  
First Stingray's Avatar
First Stingray
Racer
Conversation Starter
All Eyes On Me
Top Answer: 1
 
Joined: Jul 2019
Posts: 422
Likes: 129
Default

I did the triple flush on my new to me 17 GS right after I bought it. I had the Chevy dealer that I bought it from check their records and it was never done. I also spoke to the original owner and he confirmed. I bought the tranny fluid from Amazon and brought it to the Chevy dealer. Saved a bunch on that since they upcharge the fluid. Glad I had it done. Won't have that shudder or torque tube issue hopefully. As for the range device, it plugs into the OBD 2 port near the hood release. As far as I know, that is the only way to keep an auto in 8 cylinder mode all the time. Perhaps there is a fuse to pull that also does that. Not sure. Hope that helps.
Reply
Old Apr 12, 2026 | 08:15 PM
  #3  
Vader_C5's Avatar
Vader_C5
Melting Slicks
Supporting Gold
10 Year Member
Community Influencer
Community Favorite
Top Answer: 5
 
Joined: May 2013
Posts: 3,042
Likes: 1,443
From: New Jersey
2025 Corvette of the Year Finalist - Unmodified
2024 C2 of the Year Winner - Unmodified
2024 C1 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
2023 C5 of the Year Winner - Unmodified
St. Jude Donor '25
Default

Call your local dealer service department and ask for a VIS report. If the triple flush is NOT listed on the VIS, then I would strongly advise you to get it done. I am getting my 2016 Triple Flush done in a couple weeks with 43k miles.
Reply
Old Apr 12, 2026 | 11:23 PM
  #4  
Photomania's Avatar
Photomania
Melting Slicks
Supporting Lifetime
Community Builder
Conversation Starter
Photogenic
Photoriffic
 
Joined: Dec 2004
Posts: 2,541
Likes: 773
Default

My Chevy dealer said they recommend the triple flush at 50,000 miles. That was when I had an A8. Now I have an M7 and I had that flushed and refilled.
Reply
Old Apr 13, 2026 | 12:34 AM
  #5  
drive it's Avatar
drive it
Melting Slicks
25 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Liked
 
Joined: Apr 2001
Posts: 2,122
Likes: 224
From: Ca.
Default

If it stays in 8 cyl. mode without the range it may well have had a tune for it. If in doubt-triple flush. I did it my self and found 3 flushes I only used 18 qts. so did a fourth to use the 24 qts. I was getting that slight shudder and now it's gone.
Reply
Old Apr 13, 2026 | 01:39 AM
  #6  
TxLefty's Avatar
TxLefty
Race Director
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2014
Posts: 10,466
Likes: 1,755
From: North Texas
Default

The Range Device or a tune will take care of the AFM issue to some degree by keeping it in V8 mode. The Triple Flush is a completely different deal. If you have a C7 with the A8 and the transmission was built before 2/1/2019, then the car needs to have the Triple Flush to get rid of the old fluid to avoid likely transmission damage. As noted above, have a VIS report pulled by the dealer and get it figured out.
Reply
Old Apr 13, 2026 | 07:19 AM
  #7  
Tinkertech's Avatar
Tinkertech
Melting Slicks
All Eyes On Me
Top Answer: 1
Top Answer: 3
Top Answer: 5
 
Joined: Feb 2018
Posts: 2,199
Likes: 1,057
From: North Texas
Default

The 'correct' triple flush ATF fluid was not available until after FEB 1, 2019.

And it's the Mobil1 'Blue label' ATF.
Reply
Old Apr 13, 2026 | 08:09 PM
  #8  
Kingman99's Avatar
Kingman99
Thread Starter
Melting Slicks
20 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Mar 2003
Posts: 2,928
Likes: 55
From: Port Saint Lucie, Florida
Default Triple flush or tune?

In this thread a tune was mentioned and it might be my answer why my engine stays in V8 all the time .
Also the the v4/v8 icon is never on.
My OBD is empty, should l check to see if a fuse was pulled?
l have been going crazy trying to figure this out.
thanks
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

 Michael S. Palmer
story-1

5 Best & 5 Worst Corvette Daily Drivers

 Joe Kucinski
story-2

The Headlights of Every Corvette Generation Explained

 Joe Kucinski
story-3

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-4

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-5

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-6

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-7

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-8

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-9

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
Old Apr 13, 2026 | 08:54 PM
  #9  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
Default

Originally Posted by Kingman99
In this thread a tune was mentioned and it might be my answer why my engine stays in V8 all the time .
Also the the v4/v8 icon is never on.
My OBD is empty, should l check to see if a fuse was pulled?
l have been going crazy trying to figure this out.
thanks
You have to switch to it in one of the gauge options.
Reply
Old Apr 14, 2026 | 12:34 PM
  #10  
duckvett's Avatar
duckvett
Safety Car
Veteran: Army
25 Year Member
Liked
Community Favorite
 
Joined: Nov 1999
Posts: 4,293
Likes: 1,166
From: Green and Wet Western Oregon
2023 C7 of the Year Winner - Unmodified
2018 C6 of Year Winner
Default

Originally Posted by Kingman99
In this thread a tune was mentioned and it might be my answer why my engine stays in V8 all the time .
Also the the v4/v8 icon is never on.
My OBD is empty, should l check to see if a fuse was pulled?
l have been going crazy trying to figure this out.
thanks
There is NO fuse that controls the AFM. Only two ways that I know of to control AFM - Range or a tune.
Reply
Old Apr 14, 2026 | 04:35 PM
  #11  
Kingman99's Avatar
Kingman99
Thread Starter
Melting Slicks
20 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Mar 2003
Posts: 2,928
Likes: 55
From: Port Saint Lucie, Florida
Default Triple Flush

So if my OBD IS empty and my dash does not show v4/v8 then l will assume my vette had a tune. I will the next time l go to my dealer
l will ask for a VIS report

thanks

ps l will wind up selling my range which is connected to a window valet
Reply
Old Apr 14, 2026 | 04:36 PM
  #12  
Vader_C5's Avatar
Vader_C5
Melting Slicks
Supporting Gold
10 Year Member
Community Influencer
Community Favorite
Top Answer: 5
 
Joined: May 2013
Posts: 3,042
Likes: 1,443
From: New Jersey
2025 Corvette of the Year Finalist - Unmodified
2024 C2 of the Year Winner - Unmodified
2024 C1 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
2023 C5 of the Year Winner - Unmodified
St. Jude Donor '25
Default

Just a quick question as I am getting my flush done next week, will the filter also be changed as part of this or will I have to request that be done as well?
Reply
Old Apr 14, 2026 | 04:44 PM
  #13  
jhopper408's Avatar
jhopper408
Burning Brakes
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2013
Posts: 1,072
Likes: 61
From: Saint clair shores Michigan
Default

I had a single flush after the guy pumped it out. The fluid looked good and smelled good with no shavings. So I didn't need a new filter.
Reply
Old Apr 14, 2026 | 04:46 PM
  #14  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
Default

Originally Posted by Kingman99
So if my OBD IS empty and my dash does not show v4/v8 then l will assume my vette had a tune. I will the next time l go to my dealer
l will ask for a VIS report

thanks

ps l will wind up selling my range which is connected to a window valet
No. You have to get to the right menu. Mine will show V8 consistently since it was tuned. Before, it could show V4 and switch to V8.

I would dump the Range unit and get it programmed professionally.
Reply
Old Apr 14, 2026 | 04:47 PM
  #15  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
Default

Originally Posted by Vader_C5
Just a quick question as I am getting my flush done next week, will the filter also be changed as part of this or will I have to request that be done as well?
What does the quote say? I would read it carefully and make sure it says what you see from the TSB.
Reply
Old Apr 14, 2026 | 04:49 PM
  #16  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
Default

Originally Posted by jhopper408
I had a single flush after the guy pumped it out. The fluid looked good and smelled good with no shavings. So I didn't need a new filter.
Can you also smell moisture? AFAIK, THAT was the issue. The old fluid is hygroscopic and it sucks up moisture and eventually becomes a problem.
Reply
Old Apr 14, 2026 | 05:46 PM
  #17  
F4Gary's Avatar
F4Gary
Race Director
Veteran: Air Force
25 Year Member
Liked
Community Favorite
 
Joined: Feb 2001
Posts: 11,383
Likes: 2,113
From: Grapevine Tx
2018 C3 of Year Finalist
2016 C3 of the Year Finalist
Default

Originally Posted by Kingman99
So if my OBD IS empty and my dash does not show v4/v8 then l will assume my vette had a tune. I will the next time l go to my dealer
l will ask for a VIS report

thanks

ps l will wind up selling my range which is connected to a window valet
A tune does not get rid of the V4/V8 indication. Change to Econ or a different mode.
How is your range device connected to a window valet? That makes no sense.
Reply

Get notified of new replies

To Triple Flush

Old Apr 15, 2026 | 09:08 AM
  #18  
Kingman99's Avatar
Kingman99
Thread Starter
Melting Slicks
20 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Mar 2003
Posts: 2,928
Likes: 55
From: Port Saint Lucie, Florida
Default

Originally Posted by Kingman99
Hi
2016 auto

How can l tell if I have had a triple flush?

My car also runs on 8 cylinders all the time. I do have the range device but it’s not plugged in.

any ideas?

the person who sold me the car gave it to me but had no clue what it was. The place where the range should
be was empty.

Any thoughts?

the range is labeled GTMOTOR IT IS plugged into Top Down Tech window valet l had this in my C5 so it works

l will try all the different combos
Reply
Old Apr 15, 2026 | 09:40 AM
  #19  
TxLefty's Avatar
TxLefty
Race Director
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2014
Posts: 10,466
Likes: 1,755
From: North Texas
Default

Originally Posted by Vader_C5
Just a quick question as I am getting my flush done next week, will the filter also be changed as part of this or will I have to request that be done as well?
I don't remember whether a new filter was part of the deal. I would ask to make sure. It doesn't make much sense to me to put a contaminated filter on a transmission with brand new fluid in it. It would be like taking a shower and putting on skid marked underwear.
Reply
Old Apr 15, 2026 | 10:18 AM
  #20  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
Default

Originally Posted by TxLefty
I don't remember whether a new filter was part of the deal. I would ask to make sure. It doesn't make much sense to me to put a contaminated filter on a transmission with brand new fluid in it. It would be like taking a shower and putting on skid marked underwear.
I don't think it was mentioned in the TSB. Regardless, it should be on the DETAILED QUOTE if you demand it. They are pretty good ad "dumb it down" for the customers. Sometimes, they will highlight the total amount in case you can't understand it.
Reply



All times are GMT -4. The time now is 05:24 PM.

story-0
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

Slideshow: Is the 2027 Chevrolet Silverado 1500 the best Silverado yet?

By Michael S. Palmer | 2026-06-16 08:01:12


VIEW MORE
story-1
5 Best & 5 Worst Corvette Daily Drivers

Slideshow: 5 best and 5 worst Corvette daily drivers

By Joe Kucinski | 2026-06-15 10:32:13


VIEW MORE
story-2
The Headlights of Every Corvette Generation Explained

Slideshow: The headlights of every Corvette generation explained

By Joe Kucinski | 2026-06-15 10:17:14


VIEW MORE
story-3
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-4
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-5
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-6
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-7
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-8
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-9
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE