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A6 Down shifting question

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Old Mar 19, 2009 | 08:50 AM
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Default A6 Down shifting question

I own a 07 C6 with the A6 autotrans and a 88 C4 with 4 speed autotrans with overdrive. My question is when I down shift the 88 for extra stopping power I get an immediate responce but with the C6 A6 there is a lag time between the time I hit the down shift paddle and and slow down. Why? It's the computer, right?
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Old Mar 19, 2009 | 09:00 AM
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Originally Posted by HAD2HAV2
I own a 07 C6 with the A6 autotrans and a 88 C4 with 4 speed autotrans with overdrive. My question is when I down shift the 88 for extra stopping power I get an immediate responce but with the C6 A6 there is a lag time between the time I hit the down shift paddle and and slow down. Why? It's the computer, right?
Safety percaution Not to blow the trany.
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Old Mar 19, 2009 | 09:06 AM
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Originally Posted by Red Rochester
Safety percaution Not to blow the trany.
trans will not downshift if not in the right rpm range
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Old Mar 19, 2009 | 10:59 AM
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That's just how they work, create you own reason why. Some say a trans tune will help some (warrenty?). The '08's are a bit crisper, so you could trade up. Or, as I have done, adjust to it and shift a little sooner. Not sure about the '09's to know if they've got it right now.
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Old Mar 19, 2009 | 02:29 PM
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I just got the A6 patch during warranty work yesterday, Shifting is much smoother. Downshifting into 1 st even works good.

The A6 is very primitive with the factory tune.

I am keeping the factory ECM tune to keep warranty good.

I have found that during the shift delay you can blip your downshifts and get some rev matching going.
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Old Mar 19, 2009 | 03:01 PM
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Originally Posted by Red Rochester
Safety percaution Not to blow the trany.
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Old Mar 19, 2009 | 03:07 PM
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Originally Posted by Red Rochester
Safety percaution Not to blow the trany.
The A6 has a lot of built in "flare" to deal with the hugh C6 power, its all about longevity.

If you dont mind doing a new trans when it blows up you can tune the H@#% out of it.
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Old Mar 19, 2009 | 03:10 PM
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The only place I have noticed even the slightest delay is 3-2. Everything else is crisp.
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Old Mar 19, 2009 | 03:19 PM
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Put it in "S" stand on the brakes to slow entry into a corner and then back to the throttle. Let the "Auto" shift for you.
Forget about the paddle shifters, I think they are just there as a marketing gimmick. The brakes will slow it down a lot quicker than engine braking without the wear on the engine.

It's amazing what you can do with modern brakes. There is just no need to use the engine for breaking anymore.
LJ
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Old Mar 19, 2009 | 04:28 PM
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When you find yourself coming up on someones rear end you may need all the braking power you can get. For the C6 I guess I'll just have to "stand on it" and hope.
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Old Mar 19, 2009 | 07:30 PM
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Originally Posted by HAD2HAV2
When you find yourself coming up on someones rear end you may need all the braking power you can get. For the C6 I guess I'll just have to "stand on it" and hope.
Downshifting will screw up your antilock braking. In the emergency stop your describing you sure don't want to consider downshifting.
LJ
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Old Mar 19, 2009 | 07:57 PM
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Originally Posted by 06 C6 vert
I just got the A6 patch during warranty work yesterday, Shifting is much smoother. Downshifting into 1 st even works good.

The A6 is very primitive with the factory tune.

I am keeping the factory ECM tune to keep warranty good.

I have found that during the shift delay you can blip your downshifts and get some rev matching going.
What year is yours? And how did you get them to this A6 patch?
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Old Mar 19, 2009 | 08:08 PM
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There is a lot of lag in the A6 (I've an '07) and gets annoying at times. I've almost lost control of the car because of the delayed response whereby I downshifted an extra gear.
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Old Mar 19, 2009 | 10:03 PM
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You can tune alot of things out of the tranny. this may be one of them.
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Old Mar 19, 2009 | 10:42 PM
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Originally Posted by HAD2HAV2
When you find yourself coming up on someones rear end you may need all the braking power you can get. For the C6 I guess I'll just have to "stand on it" and hope.
The fastest way you will ever stop the car is just to hit the brakes. Forget about the transmission. Plus the auto downshifts for you as it slows down anyway.
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Old Mar 19, 2009 | 10:59 PM
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[QUOTE=RED HUSKY;1569365937]What year is yours? And how did you get them to this A6 patch?[/QUOTE

Mine is a 06 and the car has been flawless. I have 5 K on it. I took it in for the TSB on the steering and told them I wanted the update patch. They D/L'd 20 updates. I have more power ( trust me I can tell) better idle, quicker throttle response, better shifting, less shift shock on D/S ing. Quicker upshifts. I am very happy with this car.
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Old Mar 20, 2009 | 12:33 AM
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Originally Posted by LarryMJones
Put it in "S" stand on the brakes to slow entry into a corner and then back to the throttle. Let the "Auto" shift for you.
Forget about the paddle shifters, I think they are just there as a marketing gimmick. The brakes will slow it down a lot quicker than engine braking without the wear on the engine.

It's amazing what you can do with modern brakes. There is just no need to use the engine for breaking anymore.
LJ
I use the paddles only when I'm in the mountains so I can control what gear the tranny is in since it has no idea what the road will do up ahead. S mode is great considering it is OEM.
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