A8 Fluid Change
Thread Starter
Pro
Joined: Mar 2006
Posts: 645
Likes: 72
From: EAST TEXAS
A8 Fluid Change
Do I understand it correctly that the latest fix from GM concerning the A8 V4 mode rpm fluctuations is a fluid flush/change only, with no torque converter replacement? If so, can somebody provide the PIP or TSB number? And where can a list of applicable PIPs and TSBs be found? Thanks for any help.
Melting Slicks
Joined: Dec 2015
Posts: 2,209
Likes: 933
From: Just outside a swamp in Florida
Sorry I can't provide you with the documents you want but I can tell you it is what they did to mine the first week of May, and It did fixed the fluctuation and shudder issues I was having. I do prefer the less invasive approach, however only time will tell if it was a success or not.
The service advisor told me if mine had been born before 11/15 it would have gotten a new torque converter, but since it was the second generation torque converter, I got the fluid flush. I was told to go drive it for a few hundred miles, and if the problems come back then I get a new torque converter.
The service advisor told me if mine had been born before 11/15 it would have gotten a new torque converter, but since it was the second generation torque converter, I got the fluid flush. I was told to go drive it for a few hundred miles, and if the problems come back then I get a new torque converter.
Racer
Joined: Sep 2010
Posts: 369
Likes: 64
From: Brownsville Tx
I had the triple-flush procedure done on my 8/16 build date 2017 GS about 3 weeks ago.
RPM fluctuations are still there, but less frequent/wide and the shuddering is gone.
I have a Range AFM delete plugged in and will probably keep it on from now on.
RPM fluctuations are still there, but less frequent/wide and the shuddering is gone.
I have a Range AFM delete plugged in and will probably keep it on from now on.
Melting Slicks
Joined: Jun 2004
Posts: 2,453
Likes: 81
From: Fishin' Pole FL
Is this something new?
They did the flush and it didn't cure the transmission.
Now they are going to drive the car with a device (reader ?) in the OBD port.
They will drive it with AFM on and then with AFM off.
They send the info to engineers at GM and then they will decide what to do.
I can't wait.
They did the flush and it didn't cure the transmission.
Now they are going to drive the car with a device (reader ?) in the OBD port.
They will drive it with AFM on and then with AFM off.
They send the info to engineers at GM and then they will decide what to do.
I can't wait.
Last edited by dndrsn; Jun 2, 2017 at 06:54 PM.
Racer
Joined: Jul 2006
Posts: 407
Likes: 99
From: MWC Okla.
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Melting Slicks
Joined: Feb 2005
Posts: 2,179
Likes: 97
From: Palm Coast, FL
I don't understand what's happening when the transmission switches to V4 mode? Everyone keeps talking about fluctuations and transmission shuttering...? Would someone please explain what scenario or scenarios of how you are driving your car when these transmission "events" start to happen? This way I can see if mine is doing that too...I normally just drive with the transmission in T (touring) and sometimes I can go for 3-5 without red lights. 
Racer
Joined: Jul 2006
Posts: 407
Likes: 99
From: MWC Okla.
Just over 20,000 now. Had the flush done at 17,200 thinking that I would be back after the 200 mile test period for the TC change but so far, it's still performing like it did when I first bought it or at least pretty close to it.
Racer
Joined: Jul 2006
Posts: 407
Likes: 99
From: MWC Okla.
I don't understand what's happening when the transmission switches to V4 mode? Everyone keeps talking about fluctuations and transmission shuttering...? Would someone please explain what scenario or scenarios of how you are driving your car when these transmission "events" start to happen? This way I can see if mine is doing that too...I normally just drive with the transmission in T (touring) and sometimes I can go for 3-5 without red lights.
Melting Slicks
Joined: Jun 2004
Posts: 2,453
Likes: 81
From: Fishin' Pole FL
The shudder for me was when cruising 35 to 80 mph felt like a tire out of balance.
Rhythmic, smooth for seconds then shudder for seconds. Does this no matter what
condition the road is. V4 or V8. Had the tires road force balanced to rule them out.
Now that it has been flushed I had the not going into reverse episode for the first time
today. I have to back up a little to exit my garage. This morning I started the car
put it in reverse to back up a little and the car did not move until I applied gas pedal.
RPM's reved up a little then lurched somewhat back. First time this has happened.
They are going to drive it with the connection to GM engineers tomorrow to see if
they will replace the torque converter. If denied I will trade it in, wait on a good
deal for a ls3 c6. Put a big cam and headers on it and be happy.
Rhythmic, smooth for seconds then shudder for seconds. Does this no matter what
condition the road is. V4 or V8. Had the tires road force balanced to rule them out.
Now that it has been flushed I had the not going into reverse episode for the first time
today. I have to back up a little to exit my garage. This morning I started the car
put it in reverse to back up a little and the car did not move until I applied gas pedal.
RPM's reved up a little then lurched somewhat back. First time this has happened.
They are going to drive it with the connection to GM engineers tomorrow to see if
they will replace the torque converter. If denied I will trade it in, wait on a good
deal for a ls3 c6. Put a big cam and headers on it and be happy.
Last edited by dndrsn; Jun 4, 2017 at 04:20 PM.