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I know that my 2014 Stingray has AFM, but is there anyway to tell when it's going into and out of V4 mode? Is there an indicator light? Is there some other visual indication? Does it only show in Economy mode? I'm planning to invest in an AFM disabler (Actually, Santa is....) but I'd like to be sure that it's active and not tuned out by the previous owner (which I highly doubt) before I find one under the tree!
Thanks in advance for your knowledge and advice.
Switch the DIC to any INFO display (Tour, Sport, or Track) and scroll down. There is one fuel economy display that shows instantaneous mpg and V4 or V8.
Scroll to the screen as shown above and watch as you drive.
Is your car a manual? If so don't put it in economy mode because the manuals only go into V4 when in Eco mode. They stay in V8 mode 100% when in the other 4 modes (weather, tour, sport and track). At least that's my understanding and what I've observed with my car
(which is a manual).
Before doing the triple flush with upgraded trans fluid replacement to address the drivetrain shudder, I monitored the V4 to V8 cycle and didn't feel the well-known shudder during the transitions. I'm thus led to believe that the AFM system isn't the shudder culprit but rather it's the wrong fluid viscosity. The fluid replacement has a better "viscosity index" that maintains viscosity at higher operating temps.
Scroll to the screen as shown above and watch as you drive.
Is your car a manual? If so don't put it in economy mode because the manuals only go into V4 when in Eco mode. They stay in V8 mode 100% when in the other 4 modes (weather, tour, sport and track). At least that's my understanding and what I've observed with my car
(which is a manual).
100% correct, and this is exactly why mine never sees Eco mode
Before doing the triple flush with upgraded trans fluid replacement to address the drivetrain shudder, I monitored the V4 to V8 cycle and didn't feel the well-known shudder during the transitions. I'm thus led to believe that the AFM system isn't the shudder culprit but rather it's the wrong fluid viscosity. The fluid replacement has a better "viscosity index" that maintains viscosity at higher operating temps.
Couple of things, I noticed the OP has a 2014, I assume it's an A6 like my 2014. I've been scanning these threads and the consensus is that the A6 doesn't suffer from the A8 torque converter shudder. In one thread I was recommended to shift to manual before reaching the speed where I have the shudder 80/82 mph. That stops the shudder in my A6 so I'm looking into the deleter. Being a two time Florida lemon law winner with the GM torque converter issue I,m curious should I at least look into the upgraded trans fluid for my A6? Just had my fluid changed recently with my mechanic and asked if he was doing a triple flush, he said theirs's no such thing lol didn't feel like arguing.
I just bought a M7 and while not on my highest priority of learning I have been curious if my car had a disable device. I have had that MPG screen up and noted V8 all the time. I have not been in eco mode yet. Its now in storage so I'll check that out in the spring to see if I have a disabler or not. 3 owners before so I don't know what they did.
Couple of things, I noticed the OP has a 2014, I assume it's an A6 like my 2014. I've been scanning these threads and the consensus is that the A6 doesn't suffer from the A8 torque converter shudder. In one thread I was recommended to shift to manual before reaching the speed where I have the shudder 80/82 mph. That stops the shudder in my A6 so I'm looking into the deleter. Being a two time Florida lemon law winner with the GM torque converter issue I,m curious should I at least look into the upgraded trans fluid for my A6?
Just had my fluid changed recently with my mechanic and asked if he was doing a triple flush, he said theirs's no such thing lol didn't feel like arguing.
The official GM line is that the fluid that was used was hygroscopic. The 2014 was the first year of the C7 and got the "Hand me Down" transmission and fluid. The 2015 got the A8 transmission AND the "Hand me Down" fluid. That was a mistake and after several iterations, they settled on the "Correct" fluid which would solve the problem provided you didn't let it get too far. My usual habit with a new used car is "It flows, it goes"., As such, with my 2016, I did the triple flush with the "Correct" fluid. If what GM said is true, sooner or later it will pick up enough moisture to be a problem. My transmission is supposed to be more sensitive to water in the fluid than your A6 so I would say it isn't necessary for you.
Your mechanic is right or wrong depending on his context. Rolling in Bill Clinton. If by "no such thing", he means that there is no such a procedure for a 2014 since it has an A6 and the fluid is fine for that transmission, he is correct. If by "no such thing" he means that there is no such procedure for a C7 with the A8 transmission, he is wrong. Independent techs might not be that knowledgeable since they work on everything that is pushed, pulled or dragged into the shop as compared to say a Corvette certified tech that has more experience dealing with that particular car since he is probably a little more involved in it than a general GM tech. If the Corvette tech at the GM shop I went to didn't know about the triple flush for a C7, I'd be looking for a new tech.
I know that my 2014 Stingray has AFM, but is there anyway to tell when it's going into and out of V4 mode? Is there an indicator light? Is there some other visual indication? Does it only show in Economy mode? I'm planning to invest in an AFM disabler (Actually, Santa is....) but I'd like to be sure that it's active and not tuned out by the previous owner (which I highly doubt) before I find one under the tree!
Thanks in advance for your knowledge and advice.
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How do I know??
