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Discussion Starter · #1 ·
In sport mode under heavier acceleration the transmission seems to down shift keeping RPM around 3000 for readiness for an up shift I cant find any info on this and don't know if its normal or something strange happening. Any thoughts or info. thanks
 

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You will notice more aggressive performance from the trans in sport mode as you'd suspect. Shifts will be firmer and the car will shift into 1st at a stop. If left in touring, the 6Ls usually will start from 2nd gear. If it's hanging up or slipping at all though, I'd get it looked at.
 

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That's just one of the reasons I traded mine in for a manual. The service guys never knew what I was talking about.
Mine would just stick in a certain gear and I'd have to upshift manually. It didn't seem right. maybe it is normal, but I didn't really care for it.
 

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I am not sure if this is what you are talking about, or if the Corvette has it, but some other GM cars have what is called "Performance Algorithm Liftfoot" (PAL) which helps determine what the automatic does after you lift your foot off the accelerator after some earlier heavy acceleration.

The idea is that you don't want the car to shift up gears (enter lower torque band) when you are going to need to get back on the gas hard in a few seconds anyway. For example, if you are driving on a curvy road and have to lift your foot for a curve, if the car allowed the gears to shift up under the reduced load, then it would be in the wrong gear (too high gear, with too little torque) when you got on it again a few seconds later after you got out of the curve.

If that is what your Corvette is doing (holding a low gear/keep RPMs and torque high for several [approximately 5+] seconds after you let off the gas pedal), then I personally would consider this normal based on knowing GM's history on this in other cars.

Does anyone on here know for sure that Corvette uses PAL like what is done in some other GM cars' transmissions' programming?
 

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Discussion Starter · #5 ·
I had once where it did hang in a lower gear keeping the RPM higher than 3000 had to bring it to a stop to get it to shift to a normal situation. I am gonna try to get dealer to give me performance info if possible. Thanks for the reply
 

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Discussion Starter · #6 ·
That seems like my experience I have had with it. I would think this would be normal on a performance transmission.
 

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If you don't like it in a particular situation, I think you should be able to just click on the gear shift-up paddle behind the steering wheel and it should immediately obey, exit PAL, and let the RPMs come back down. Let us know if that works for you!
 
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Hi Douge,

If you want to head into the dealership to have them check it out, please let me know. I am more than happy to set you up a visit and get into contact with the Service Team to let them know of your concerns with the transmission. Better safe than sorry!

Keep me posted,

Kelly J.
Chevrolet Customer Care
 

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This morning at 5 degrees on a 2 lane blacktop I switched the display to 0 - 60 to get an idea how my 600 mile stingray would do in this cold weather. Manual shifting with the all season tires on first and only run got 4.8 seconds. I did nothing special except floor it and shift at 6000. I thought under all conditions this was pretty good. Quite a bit of tire spin in first and second.
 

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This morning at 5 degrees on a 2 lane blacktop I switched the display to 0 - 60 to get an idea how my 600 mile stingray would do in this cold weather. Manual shifting with the all season tires on first and only run got 4.8 seconds. I did nothing special except floor it and shift at 6000. I thought under all conditions this was pretty good. Quite a bit of tire spin in first and second.
Is that something you should be doing before the car has completed its break-in period of 1,500 miles? at 5 degrees? I thought sharp starts, stops and driving at the same speed for extended periods should be avoided during the break-in period. See page 9-17 of the owners manual.
 

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Is that something you should be doing before the car has completed its break-in period of 1,500 miles? at 5 degrees? I thought sharp starts, stops and driving at the same speed for extended periods should be avoided during the break-in period. See page 9-17 of the owners manual.
do you honestly think that anyone ever reads an owners manual? Bwahahahaha!
 

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I read the manual and follow the engineers advice. Who knows more than the guys who built it?
 

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Discussion Starter · #15 ·
After playing around with the car it goes into the PAL mode is when traction control is activated on heavy throttle going around a corner. I am thinking this is normal it acts this way pretty consistently.
 

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After playing around with the car it goes into the PAL mode is when traction control is activated on heavy throttle going around a corner. I am thinking this is normal it acts this way pretty consistently.
Just picked up my new C7 2 days ago. Today driving it seemed easier. Geting used to it. The car is intuitive and there are tons of settings. I'm changing a few a day. Today I did the exhaust and changed the DIC to show me whether I was in V4 or V8. I am amazed how continuous it goes from V4 to V8 and back again. Totally unnoticeable. It does it at any speed in all modes. Incredible technology to do that.

I will avoid testing the traction control or PAL but I'm glad its there. Your explanation makes sense and doesn't surprise me with the sophistication of this car.
 

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I would not recommend driving the car in Eco mode for first 500-1000 miles during break-in. Better to have all eight cylinders firing while rings seat etc.


Sent from my iPad using Corvette Stingray Forum
 

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I would not recommend driving the car in Eco mode for first 500-1000 miles during break-in. Better to have all eight cylinders firing while rings seat etc.


Sent from my iPad using Corvette Stingray Forum

The AFM is active in all modes on Automatic Transmission models. I run the car in tour mode.
 

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I did not know that. I would like the option to allow V4 mode in touring and sport. Guess there is a reason they did not do this for the manual but I can't see why.


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