"Performance Shift Active"
Thread Starter
Burning Brakes
Joined: Oct 2014
Posts: 762
Likes: 125
From: Houston TX
"Performance Shift Active"
Driving in Sport mode, "Performance Shift Active" showed up oncreen when I kept on the gas while driving in a high spirit mode.
Is that a bad thing?
Will it hurt the transmission?
Or is that normal performance feature of the Vette?
Thanks,
Is that a bad thing?
Will it hurt the transmission?
Or is that normal performance feature of the Vette?
Thanks,
Burning Brakes
Joined: Jan 2004
Posts: 1,009
Likes: 54
From: slower lower DE
Racer
Joined: Dec 2013
Posts: 453
Likes: 23
From: Londonderry NH
On the roads that I drive regularly there is an onramp to the highway. It is a long slightly inclined onramp, probably about a 1/2 mile long. Very clear sight of the road. When there are no cars in front of me I will get on it and as the trans is getting closer to shifting I will see "Performance Shift Activated" if you get off the gas at this point you will notice the trans seems to keep the RPM higher before shifting.
Another road that I drive on has a rotary (or roundabout) on a road near an airport, it is not a busy road at the time of day that I drive it. I come into the rotary and take the first road so it is basically a 90 degree turn. I will sometimes come into it and not use my brakes, I will turn the car hard but I'm not on the gas. I would say I am probably doing 30MPH or so. It seems that the hard turn also causes "Performance Shift Activated" to activate.
Hope this helps.
-Mark
Safety Car
Joined: Aug 2012
Posts: 3,960
Likes: 1,106
From an earlier GM document when this system appeared several years ago:
"Performance Algorithm Shifting (PAS) -- PAS is a transmission algorithm that looks at lateral acceleration,
throttle, and vehicle deceleration activity to determine if the vehicle is being driven in a competitive manner. If the
algorithm recognizes these conditions, it can force downshifts and hold lower gears for optimized vehicle
performance.
Performance Algorithm Lift Foot (PAL) -- PAL minimizes upshifts during closed throttle driving and cornering to
prevent unnecessary shifting.
"Performance Algorithm Shifting (PAS) -- PAS is a transmission algorithm that looks at lateral acceleration,
throttle, and vehicle deceleration activity to determine if the vehicle is being driven in a competitive manner. If the
algorithm recognizes these conditions, it can force downshifts and hold lower gears for optimized vehicle
performance.
Performance Algorithm Lift Foot (PAL) -- PAL minimizes upshifts during closed throttle driving and cornering to
prevent unnecessary shifting.
Drifting
Joined: Sep 2013
Posts: 1,505
Likes: 13
It's a great feature and for the life of me I don't understand why they don't allow you to select this mode in one of the track settings or make it the default mode whenever you are in track mode.
I'm not saying don't allow it in sport or touring, keep it the way it is today, just turn it on whenever track mode is selected.
I'm not saying don't allow it in sport or touring, keep it the way it is today, just turn it on whenever track mode is selected.
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Drifting
Joined: Apr 2013
Posts: 1,743
Likes: 453
From: Saint Clair Shores Mi
Is this feature on the A6 or A8 - or on both? I've made some fairly long runs holding 3/4 throttle steady for maybe 1/2 to 3/4 mile in both sport and track. I never saw this this come on with my A8. I'm running from 10/15 MPH up to well over a 100. ???
Melting Slicks
Joined: Jun 2004
Posts: 2,130
Likes: 54
From: Granbury, Pecan Plantation TX
This is out of the 2015 Manual and is the same with the 2014 A6.
Transmission Shift Mode − Paddle
Shift Automatic
. Adjusts to either a smoother or
firmer shift.
. Sport – Performance Algorithm
Liftfoot (PAL) recognizes
aggressive throttle maneuvers
and holds lower gears for
greater engine braking and
enhanced vehicle control when
not using paddles. (Available in
Sport or Track mode.)
. Track – Performance Algorithm
Shift (PAS) recognizes
aggressive cornering, heavy
braking, and high acceleration to
select and hold lower gears
when not using paddles.
Transmission Shift Mode − Paddle
Shift Automatic
. Adjusts to either a smoother or
firmer shift.
. Sport – Performance Algorithm
Liftfoot (PAL) recognizes
aggressive throttle maneuvers
and holds lower gears for
greater engine braking and
enhanced vehicle control when
not using paddles. (Available in
Sport or Track mode.)
. Track – Performance Algorithm
Shift (PAS) recognizes
aggressive cornering, heavy
braking, and high acceleration to
select and hold lower gears
when not using paddles.
Melting Slicks
Joined: Dec 2009
Posts: 3,213
Likes: 17
had this happen in track mode with all nanies turned off .made a turn and gave it about 3/4 ped. after it was stright it held the 1st gear longer, then after it shifted the msg. poped up .i couldn't tell any diff.
Drifting
Joined: Apr 2013
Posts: 1,743
Likes: 453
From: Saint Clair Shores Mi
Thanks - I've noticed when I do a fairly long run, when I let up it stays in what ever gear it's in for a couple seconds before up-shifting on its own. I just don't remember seeing any pop-up message, but I probably didn't notice it; next time I'll look for it. Fortunately I work at an airport and my route to work parallels a long runway on airport property that is smooth and rarely has any traffic. 1/2 mile straight with 90 degree corner followed by 1 mile long straight. Easy to get carried away as it is a 40 MPH speed-limit. Nice summer runs, but treacherous in the winter with blowing snow.
Drifting
Joined: Jun 2013
Posts: 1,764
Likes: 10
From: Cumming GA
On order: Torch Red Z51
It's really cool when you're in the mountains. A hard stomp on the throttle can activate it and it works for about 10 sec. If you don't keep driving hard it will return to normal in about 10 sec. If you hit the brakes while it's active it does some really cool (and fast) downshifting. Makes me smile every time and mutter something like smart a** tranny, love ya 
.
.
Last edited by Cruiter; Nov 5, 2014 at 03:01 PM.
Melting Slicks
Joined: Dec 2009
Posts: 3,213
Likes: 17
Yep it comes up fast and goes away fast.
I had posted about this
When I was having all kind
Of things pop up one day after the other. First it was the colored rings on the
Outside of the tac. Next day this . Wish these msgs. Would stay up longer.l would like to duplicate the p.shift to see just what it does.....👍
I had posted about this
When I was having all kind
Of things pop up one day after the other. First it was the colored rings on the
Outside of the tac. Next day this . Wish these msgs. Would stay up longer.l would like to duplicate the p.shift to see just what it does.....👍
Last edited by lastcowboy; Nov 5, 2014 at 03:06 PM.
Melting Slicks
Joined: May 2013
Posts: 2,416
Likes: 805
From: Argyle, Texas
This is something I really want an option to keep on at all times when in track mode. I would prefer to be able to know exactly when it would come on and go off than to have it arbitrarily happen while driving around town.
Racer
Joined: Mar 2005
Posts: 356
Likes: 1
From: Fort Myers FL
On the roads that I drive regularly there is an onramp to the highway. It is a long slightly inclined onramp, probably about a 1/2 mile long. Very clear sight of the road. When there are no cars in front of me I will get on it and as the trans is getting closer to shifting I will see "Performance Shift Activated" if you get off the gas at this point you will notice the trans seems to keep the RPM higher before shifting.
-Mark
It definitely makes an impression
( '14 Z51 auto)
Burning Brakes
Joined: Oct 2010
Posts: 833
Likes: 240