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🥳 Third party tools do DCT flush! 🥳

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Old Oct 22, 2023 | 04:33 PM
  #41  
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Originally Posted by Phil1098
Well that's a good value then. So the tool will take control of the ECM and run the RPMs up to 2,000 and do the flush without any intervention from you? (other than you telling it to perform the flush procedure)
Appears so based on feedback of others... I need to order a DCT filter so I can test it firsthand. I'm due for fresh fluid next summer (built 7/1/21), but a new filter this fall won't hurt; I'll actually be at the 22.5k mile mark within a few months.
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Old Oct 22, 2023 | 04:33 PM
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Correct the $159 tool does it.

I believe the other tool is so expensive because it can "call home" to gm for with the right subscriptions to perform other functions, which aren't needed for the dct and npp stuff.

I am waiting for someone else to be the first to try the procedure and report back. After all it was just released. Call me a chicken lol.

Filter, quart of fluid, and tool here waiting patiently for my guinea pig!
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Old Oct 22, 2023 | 04:36 PM
  #43  
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Originally Posted by 22c8z51
Correct the $159 tool does it.

I believe the other tool is so expensive because it can "call home" to gm for with the right subscriptions to perform other functions, which aren't needed for the dct and npp stuff.

I am waiting for someone else to be the first to try the procedure and report back. After all it was just released. Call me a chicken lol.

Filter, quart of fluid, and tool here waiting patiently for my guinea pig!
I have my scantool updated and 3 quarts of ACDelco DCT fluid in the garage. I'll get a DCT filter ordered from RockAuto sometime soon.
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Old Oct 22, 2023 | 04:42 PM
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Since I added the two extra quarts, I don't recall if any extra comes out at filter change or not. After pulling my airbox twice, I'm not looking forward to a third.
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Old Oct 22, 2023 | 04:45 PM
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Originally Posted by Phil1098
Since I added the two extra quarts, I don't recall if any extra comes out at filter change or not. After pulling my airbox twice, I'm not looking forward to a third.
I read where the same amount of DCT fluid comes out with a filter change with or without the two extra qts. so you don't really have to top it up; there will be about 1.5 qts extra in the DCT if you had added 2 extra qts earlier.
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Old Oct 22, 2023 | 04:58 PM
  #46  
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Originally Posted by Phil1098
Since I added the two extra quarts, I don't recall if any extra comes out at filter change or not. After pulling my airbox twice, I'm not looking forward to a third.
I have the +2 in mine as well, so technically no top-off is required during a filter change. You lose the same X (4-8?) ounces of fluid.

The easiest way to add track fluid is to jack the car up at an angle and add the additional 2 quarts through the standard fill bolt.
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Old Oct 22, 2023 | 05:40 PM
  #47  
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Originally Posted by Kracka
Appears so based on feedback of others... I need to order a DCT filter so I can test it firsthand. I'm due for fresh fluid next summer (built 7/1/21), but a new filter this fall won't hurt; I'll actually be at the 22.5k mile mark within a few months.
Ours where built pretty close together. I hope you get it figured out before July, as I really don't want to pay a dealer to do this.
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Old Oct 22, 2023 | 06:33 PM
  #48  
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Originally Posted by tsigwing
Ours where built pretty close together. I hope you get it figured out before July, as I really don't want to pay a dealer to do this.
You're local to me so let me know if you want to use my scantool sometime. Do you happen to have access to a lift?
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Old Oct 22, 2023 | 06:35 PM
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Originally Posted by Kracka
You're local to me so let me know if you want to use my scantool sometime. Do you happen to have access to a lift?
I have a quickjack.
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Old Oct 22, 2023 | 07:11 PM
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I did my DCT fluid AND filter change using my QuickJack..... no problem

Did the engine oil and filter too..... same day.

Last edited by Strake; Oct 22, 2023 at 10:56 PM.
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Old Oct 22, 2023 | 10:26 PM
  #51  
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Originally Posted by tsigwing
I have a quickjack.
Nice. Sounds better that using jacks/jackstands.
Originally Posted by Strake
I did my DCT fluid AND filter change using my QuickJack..... no problem
Good to hear everything remained accessible!
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Old Oct 23, 2023 | 06:38 AM
  #52  
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Originally Posted by Kracka
Nice. Sounds better that using jacks/jackstands.

Good to hear everything remained accessible!
Yes and no, to remove both the black composite belly pan and the aluminum shear plate/belly pan using a QJ, you need to remove the side bolts of the black pan and one bolt on the aluminum pan prior to going up on the QJ. No room for those once up on the QJ. It also blocks the front of the aluminum pan from dropping and so you need to persuade the rear tab out to drop the pan.
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Old Oct 23, 2023 | 07:33 AM
  #53  
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^^^
Not sure if 1 inch high jack pads helps with Quick Jack? The Tech who does mine always lifts with my 1 inch high Jack Pads on his post lift arm pads. It assures he is lifting on the frame. When removing the 4 bolts close to the GM frame oval slots they allow access to the 4 side bolts with an open end (or box end) wrench.

He uses a power wrench for all other bolts. This last DCT fluid and filter change it was easy to remove the black composite panel as loosening the bolts enough to get the aluminum panel out.

Bottom Pic shows a tech Chuck from a video who said they had to lift the car several times reposting their large lift arm pads to get the 4 aluminum cover bolts that are close to the oval slots. The tech who does mine (top pic) uses my 1" high jack pads that allowed access to those 4 bolts with a combo open end/box wrench.


He uses a powered wrench for all other bolts and found it just as easy to remove the black composite panel to allow removal on the front aluminum panel.

Last edited by JerryU; Oct 23, 2023 at 08:28 AM.
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Old Oct 23, 2023 | 07:42 AM
  #54  
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Originally Posted by JerryU
^^^Not sure if 1 inch high jack pads helps with Quick Jack?
I use 1" pads and then the rubber blocks from the QJ. Just easier to remove the few bolts prior to using the QJ.
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Old Oct 23, 2023 | 09:08 AM
  #55  
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Originally Posted by Strake
I did my DCT fluid AND filter change using my QuickJack..... no problem

Did the engine oil and filter too..... same day.
@Strake Ballpark how much time did it take you to do the DCT fluid and filter change (also acknowledging that it was your first time and probably took longer)?
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Old Oct 23, 2023 | 09:32 AM
  #56  
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LeMansz........ as stated, I did and engine oil and filter change, then the DCT fluid and then filter change. All total, including pulling car in, putting it on my QuickJack lift, pulling rear wheels, removing the underside skinning panels, etc and the entire refill process for the DCT...... it was about 5 total hours. This also includes transferring the old oil into the containers that the new oil came in, and clean up of my oil drain pans, syringe pump, funnel, etc. The clean up alone was about an hour.

I did the DCT re fill using a funnel from above in the engine bay connected to a 4 ft piece of 3/8" clear tubing which was connected to a threaded hose barb fitting that screwed into the DCT ( see picture). I let gravity do the work and fill the DCT. After filling, I disconnected the hose and fitting, put the fill plug back in, lowered the car, ran the car and put it in drive for 45 seconds, then put it in reverse for 45 seconds and repeated the process for two more times. Then raised the car back up, and checked the DCT fluid level...... had to add another half liter of fluid. For the final top up on fluid, and to be able to precisely control the fill and stop and back up to prevent a mess, I used a giant syringe hand pump. See pic.




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Old Oct 23, 2023 | 09:34 AM
  #57  
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Default From my past experience with tools

Originally Posted by Kracka
The cheap one does what I need, AFM/NPP exhaust valve relearns and now the DCT hydraulic flush procedure, without any additional fees or subscriptions.
At least in the BMW realm, was that many of the 'tests' already exist within the car modules themselves. All the tool does it to send the necessary initiation codes and parameters.
It may be different in the GM world.
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Old Nov 1, 2023 | 09:36 PM
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This thing pays for it's self in one use, for anyone handy and is going to drive their C8 at least 45,000mi in 5 years this tool is a no brainer. Almost too good to be true. It has been verified to work? by forum members, correct?
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Old Nov 1, 2023 | 09:44 PM
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Originally Posted by Acpantera
This thing pays for it's self in one use, for anyone handy and is going to drive their C8 at least 45,000mi in 5 years this tool is a no brainer. Almost too good to be true. It has been verified to work? by forum members, correct?
Not so far. People that have tried it have had problems.
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Old Nov 1, 2023 | 10:24 PM
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Bummer
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