tuning for auto transmission
08-04-2018, 12:58 PM
#1
Instructor
Thread Starter
tuning for auto transmission
There's one thing I want my vette to do differently. When you're cruising in 6th and want to down shift to say 3rd; you pop it into sport mode and hit the paddle shifter 3 times... and wait as it carefully goes through the gears. This often means the car down shifts while I'm in a turn instead of just before the turn. Is this something that can be changed with a tune? Can the car just jump to whatever gear you tell it to?
2007 base.
2007 base.
08-09-2018, 09:46 PM
#5
Supporting Vendor
08-09-2018, 09:54 PM
#6
Instructor
Thread Starter
08-16-2018, 07:07 PM
#8
Can you elaborate on this? Does the stock ECU have a built in delay or something? I know tuners can change shift points, but I didn't know they could improve the speed of the shifts. I had assumed this was a limitation of the mechanical bits, and not something programmed into the computer.
08-17-2018, 01:11 PM
#9
Supporting Vendor
Shift speed can indeed be adjusted in the tune.
To clarify, this is the amount of time it takes to perform the actual shift, has nothing to do with the delay from when you click the paddle to when the trans 'does something'
Is holding the downshift paddle not an option to downshift to the lowest available gear in these cars?
In my charger I can simply hold the downshift paddle for a second and it automatically drops to the lowest/safe gear based on speed. Roll race special
I don't recall if my T43 equipped Caddy had the same option or not...
To clarify, this is the amount of time it takes to perform the actual shift, has nothing to do with the delay from when you click the paddle to when the trans 'does something'
Is holding the downshift paddle not an option to downshift to the lowest available gear in these cars?
In my charger I can simply hold the downshift paddle for a second and it automatically drops to the lowest/safe gear based on speed. Roll race special
I don't recall if my T43 equipped Caddy had the same option or not...
08-19-2018, 08:29 AM
#10
Drifting
Member Since: Jan 2005
Location: Tucson Arizona
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St. Jude Donor '08
Yes, if the left (-) minus paddle is held down briefly, the transmission will downshift to the lowest gear possible for the vehicle speed. And if the paddle continues to be held down as the vehicle slows, downshifts will continue to occur as vehicle speed allows.
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2FAST4U (09-08-2018)
08-19-2018, 11:10 AM
#11
Instructor
Thread Starter
whaaaaaattt??? it does that stock? time for a test drive!
08-20-2018, 11:38 AM
#13
Instructor
Thread Starter
Tried it. Didn't work. it just down shifted once. tried holding the left - tried the right - tried both at once. held them down for at least 5 seconds, nothing happened. Maybe this isn't a feature on an 07? They changed the firmware after 08 right?
08-29-2018, 02:24 PM
#16
Can Diablo tune change rpm shift points?
Shift speed can indeed be adjusted in the tune.
To clarify, this is the amount of time it takes to perform the actual shift, has nothing to do with the delay from when you click the paddle to when the trans 'does something'
Is holding the downshift paddle not an option to downshift to the lowest available gear in these cars?
In my charger I can simply hold the downshift paddle for a second and it automatically drops to the lowest/safe gear based on speed. Roll race special
I don't recall if my T43 equipped Caddy had the same option or not...
To clarify, this is the amount of time it takes to perform the actual shift, has nothing to do with the delay from when you click the paddle to when the trans 'does something'
Is holding the downshift paddle not an option to downshift to the lowest available gear in these cars?
In my charger I can simply hold the downshift paddle for a second and it automatically drops to the lowest/safe gear based on speed. Roll race special
I don't recall if my T43 equipped Caddy had the same option or not...
09-05-2018, 12:06 PM
#18
WOT engine cuts out
thanks for your re Mike...I'm a bit Leary about bumping the rev limiter over the rpm limit. Would rather change the tranny shift points. Is that feature of n mu Diablo tune or do I have to download it from the Ignition icon?
09-05-2018, 12:11 PM
#19
Supporting Vendor
Is this a stock car?
Are you asking about lowering the shift points to keep it from hitting the limiter?
If the shift points and limiters are all stock, and it hits the limiter in D on any shift, there's more likely a possible trans issue that needs to be addressed here...
Are you asking about lowering the shift points to keep it from hitting the limiter?
If the shift points and limiters are all stock, and it hits the limiter in D on any shift, there's more likely a possible trans issue that needs to be addressed here...
09-15-2018, 09:56 AM
#20
Le Mans Master
Mike , I think he is waiting to long to flip the paddle causing the car to bang the revlimiter because of the delay time
While running a road course I would just anticipate the delay and bump the paddle a little sooner
when I installed my Diablo Lew Tune ...and running the 1/4 mile I just left the shifter in automatic sport and let the trans do the shifting ... it shifted right on the redline every time
Dave
While running a road course I would just anticipate the delay and bump the paddle a little sooner
when I installed my Diablo Lew Tune ...and running the 1/4 mile I just left the shifter in automatic sport and let the trans do the shifting ... it shifted right on the redline every time
Dave
Last edited by Dcasole; 09-15-2018 at 09:57 AM.