Is the automatic transmission in the Z06 that bad?
06-21-2018, 03:16 PM
#61
Melting Slicks
You make no sense to me. Yes, what you describe is an effective way to combat heating, but if you just want to go around the track quickly, you do it in D. It's faster than the M7 and faster than paddle shifting. And yes, the car actually can and does "anticipate" what gear you need next.
If you were more open to it, I'd dig up a cool article that covered it all that I read some time ago, I found it pretty impressive and interesting. It'll shift in corners with wheels off the ground, shift multiple gears, and lots of stuff.
If you were more open to it, I'd dig up a cool article that covered it all that I read some time ago, I found it pretty impressive and interesting. It'll shift in corners with wheels off the ground, shift multiple gears, and lots of stuff.
YMMV
Bish
The following 2 users liked this post by thebishman:
chevyfanatic (06-21-2018),
djnice (06-22-2018)
06-21-2018, 03:37 PM
#62
Racer
As I mentioned, leaving the car in 'D' is highly effective on a road course, but it's useless for an Advanced driver at an HPDE since the car will be in limp mode in 3-4 laps; hence it has to be driven in 'M' mode to last the whole session. Further, whilst the car can attempt to find the correct gear given input from it's myriad of sensors, 'it' can't tell when there's a slower car in front; debris/oil/water on track, etc. Further, IF you know the track and what you're doing, a good driver knows exactly what gear works best in any given corner and situation instead the of the car just staying between 5K-6.5K rpm.
YMMV
Bish
YMMV
Bish
The following users liked this post:
thebishman (06-22-2018)
06-21-2018, 03:39 PM
#63
Pro
Is the TCM tuning different from an ECU tune where it voids the powertrain warranty immediately?
06-21-2018, 03:41 PM
#64
Racer
06-22-2018, 01:21 AM
#65
Le Mans Master
Member Since: Oct 2005
Location: Metro Detroit Michigan
Posts: 7,076
Received 1,817 Likes
on
1,085 Posts
Why would you want a bang-shift? The smoothness of the shift is what helps maintain traction.
06-22-2018, 01:40 AM
#66
Racer
the stock TCM is horrible when you're shifting the paddles because you actually go forward whereas now you actually go back in your seat because the throttle cut off doesn't happen.
they have the tuning on the TCM so weak that it actually cuts the throttle off when you're shifting and you fall forward.
And now it feels a little bit like dual clutch transmission although it's not quite as quick. so no it doesn't lose traction now. that's completely wrong. The other thing he fixed on my car was that it would never shift from 3rd to 2nd on a down shift when you slow down it would always going to 1st directly because the tuning was set wrong. 2nd was set same as 1st.
I've been driving my car for a year and a 1/2 and now it's the best it's ever been thanks to Aaron Hibbs my tuner. The . overall responsiveness of the car is so much better than it was when it was stock and had that terrible TCM soft tuning. If you've ever even driven a BMW with the a8 transmission in sport plus or a pdk with SC on you would see that it shifts a lot closer to that now although it's still not quite as quick.
much firmer harder harder shifts that simulate what a normal DC transmission does.
The following users liked this post:
djnice (06-22-2018)
06-22-2018, 02:52 AM
#67
Melting Slicks
06-22-2018, 04:24 AM
#68
Racer
honestly the tcm tuning on the a8 feels a bit artificial but its a vast improvement over stock ultra lazy shifts. Another thing is my car's completely modified so it obviously is going to feel more responsive than the stock z06. near 700 whp on e85 and soon hope 800 whp with the maggy 2.3 blower.
The benchmark for a fast shifting non dc trans automatic is a ZF 8speed transmission.. the BMW zf trans feels faster than a lot of DC trans. amazingly good.
Last edited by chevyfanatic; 06-22-2018 at 04:27 AM.
06-22-2018, 04:39 AM
#69
Le Mans Master
Member Since: Oct 2005
Location: Metro Detroit Michigan
Posts: 7,076
Received 1,817 Likes
on
1,085 Posts
Then you must have missed what I said.
the stock TCM is horrible when you're shifting the paddles because you actually go forward whereas now you actually go back in your seat because the throttle cut off doesn't happen.
they have the tuning on the TCM so weak that it actually cuts the throttle off when you're shifting and you fall forward.
And now it feels a little bit like dual clutch transmission although it's not quite as quick. so no it doesn't lose traction now. that's completely wrong. The other thing he fixed on my car was that it would never shift from 3rd to 2nd on a down shift when you slow down it would always going to 1st directly because the tuning was set wrong.
the stock TCM is horrible when you're shifting the paddles because you actually go forward whereas now you actually go back in your seat because the throttle cut off doesn't happen.
they have the tuning on the TCM so weak that it actually cuts the throttle off when you're shifting and you fall forward.
And now it feels a little bit like dual clutch transmission although it's not quite as quick. so no it doesn't lose traction now. that's completely wrong. The other thing he fixed on my car was that it would never shift from 3rd to 2nd on a down shift when you slow down it would always going to 1st directly because the tuning was set wrong.
Last edited by Warp Factor; 06-22-2018 at 04:40 AM.
06-22-2018, 11:33 AM
#70
Melting Slicks
honestly the tcm tuning on the a8 feels a bit artificial but its a vast improvement over stock ultra lazy shifts. Another thing is my car's completely modified so it obviously is going to feel more responsive than the stock z06. near 700 whp on e85 and soon hope 800 whp with the maggy 2.3 blower.
The benchmark for a fast shifting non dc trans automatic is a ZF 8speed transmission.. the BMW zf trans feels faster than a lot of DC trans. amazingly good.
The benchmark for a fast shifting non dc trans automatic is a ZF 8speed transmission.. the BMW zf trans feels faster than a lot of DC trans. amazingly good.
Agreed that it’s no DCT, but it’s perfectly useable.
I hope the C8 version uses a DCT that is as good as the one in this car:
I leave it in auto and love it !!!!!!!!!!!
06-22-2018, 12:01 PM
#72
Le Mans Master
As I mentioned, leaving the car in 'D' is highly effective on a road course, but it's useless for an Advanced driver at an HPDE since the car will be in limp mode in 3-4 laps; hence it has to be driven in 'M' mode to last the whole session. Further, whilst the car can attempt to find the correct gear given input from it's myriad of sensors, 'it' can't tell when there's a slower car in front; debris/oil/water on track, etc. Further, IF you know the track and what you're doing, a good driver knows exactly what gear works best in any given corner and situation instead the of the car just staying between 5K-6.5K rpm.
YMMV
Bish
YMMV
Bish
You might want to be down at 3500rpm in the corner but if 5000rpm is better, let the computer have it, I say! Until it overheats, as you plainly said.
06-22-2018, 12:44 PM
#73
Le Mans Master
One thing I read about a high end car (maybe the NSX) was that they tied shift firmness to how crisply you pulled the paddle. So if you pull the paddle slowly, soft shift. Pull it hard, bang shift. Sounds like fun!
Last edited by davepl; 06-22-2018 at 12:45 PM.
06-22-2018, 03:38 PM
#74
Team Owner
I leave mine in "D" I like it and it works just fine. Paddles are more a novelty than anything else.
Big reason for me with the Auto is faster 60ft The A8 easy lays a faster 60ft. It is not A8 vs M7
it is A8 or M7 both are great and totally different drivers. Esp when you add the comp seats to the manual
then have the GT's in the A8. Really different feel.
Big reason for me with the Auto is faster 60ft The A8 easy lays a faster 60ft. It is not A8 vs M7
it is A8 or M7 both are great and totally different drivers. Esp when you add the comp seats to the manual
then have the GT's in the A8. Really different feel.
06-22-2018, 04:24 PM
#75
Burning Brakes
Then you must have missed what I said.
the stock TCM is horrible when you're shifting the paddles because you actually go forward whereas now you actually go back in your seat because the throttle cut off doesn't happen.
they have the tuning on the TCM so weak that it actually cuts the throttle off when you're shifting and you fall forward.
And now it feels a little bit like dual clutch transmission although it's not quite as quick. so no it doesn't lose traction now. that's completely wrong. The other thing he fixed on my car was that it would never shift from 3rd to 2nd on a down shift when you slow down it would always going to 1st directly because the tuning was set wrong. 2nd was set same as 1st.
I've been driving my car for a year and a 1/2 and now it's the best it's ever been thanks to Aaron Hibbs my tuner. The . overall responsiveness of the car is so much better than it was when it was stock and had that terrible TCM soft tuning. If you've ever even driven a BMW with the a8 transmission in sport plus or a pdk with SC on you would see that it shifts a lot closer to that now although it's still not quite as quick.
much firmer harder harder shifts that simulate what a normal DC transmission does.
the stock TCM is horrible when you're shifting the paddles because you actually go forward whereas now you actually go back in your seat because the throttle cut off doesn't happen.
they have the tuning on the TCM so weak that it actually cuts the throttle off when you're shifting and you fall forward.
And now it feels a little bit like dual clutch transmission although it's not quite as quick. so no it doesn't lose traction now. that's completely wrong. The other thing he fixed on my car was that it would never shift from 3rd to 2nd on a down shift when you slow down it would always going to 1st directly because the tuning was set wrong. 2nd was set same as 1st.
I've been driving my car for a year and a 1/2 and now it's the best it's ever been thanks to Aaron Hibbs my tuner. The . overall responsiveness of the car is so much better than it was when it was stock and had that terrible TCM soft tuning. If you've ever even driven a BMW with the a8 transmission in sport plus or a pdk with SC on you would see that it shifts a lot closer to that now although it's still not quite as quick.
much firmer harder harder shifts that simulate what a normal DC transmission does.
06-22-2018, 06:15 PM
#76
Race Director
06-22-2018, 07:41 PM
#77
Racer
yes we removed most of the torque management by bumping up pressures etc and firmness. its way wst better then stock. the fuel cut off when shifting really sckd.
06-23-2018, 08:34 AM
#78
I have the A8 in the Vette, DCT in my GTR and A10 in my ZL1. By far the best tranny is the A10. Its an engineering marvel and shifts faster than the DTC and the downshift capabilities are far superior. It’s too bad GM didn’t figure out a way to stuff it into the Z06!
06-23-2018, 09:31 AM
#80