BOBSZ06

Can you please specify what changes you make via Auto Cal to the A8 on a Z06?

1. Can you reduce the lag in the shifting of the A8 during MANUAL shifting?


If someone on these Forums has had this performed then lets hear about the changes and what impact this has on the A8 in terms of wear and warranty.


Thanks for being specific!

b4i4getit

As everybody should know by now the A8 was never intended just for the Corvette and has to fill many vehicles in the GM lineup. It should not be compared to a good DCT and those that try to say it is as good as the Porsche PDK are just fooling themselves. It is not a bad transmission by any means but it is not as great as the marketing crap would have you believe.

davepl

Oooh, I've offended an elder. Relax grandpa, I'm just tired of people talking about the PDK relative to the Z06 and owning one doesn't change that. I've got an SMG that I don't mention, a TKO-600 that I ever talk about, and so on. Feel free not to talk about your PDK.

My actual point could be summarized as "Don't be the loser that randomizes a good A8 tuning thread with PDK ramblings", and I stand by that. See how Chuck COW actually answered the question instead of a completely useless and passive aggressive "Happy Thanksgiving and You Suck" line?

I was on the Vettenet listserv by 1991 so you're a noob to me anyway. I mean I think I dated Hib Halverson's sister for a while, that's how long ago it was.

BOBSZ06

Hello? Anyone.

Can the Paddle shift be modified so it shifts like in Performance Mode at all times?

davepl

I'm not a transmission tuner, and Chuck COW can chime in here, but I think the answer is "no", or "you don't want that".

Unless the trans knows it's in paddle shift mode and can run different line pressures in response, you'd have to otherwise bring up the pressures for all part-throttle shifts, and that'd get annoying in a hurry.

Now if the code has separate tables, perhaps you could get into it and bring up the pressures only in manual mode, but I'm not aware of manual-mode tables. There are performance mode tables, but that's different.

0Terry@BMS

HP Tuners has tons of trans tables in it. Just open it up and start trying stuff.

b4i4getit

I can't understand why someone would want to blow their warranty by changing some transmission parameters. Unless of course the car is out of warranty or you have deep pockets.

BOBSZ06

I would appreciate hearing from a C7 A8 owner that had the CoW A8 tune and what they believe was done and the outcome.

Is the manual shifting better?
With less lag?

....not that I have any plans for mine, but just curious about what can be done.

0Terry@BMS

If you want to keep a full warranty in place accept the car for how it comes from the factory. If how it comes is not how you'd like it and the minimal risk of a major failure is not a concern to you. Then modify the car to suit your specific needs.

Mopar Jimmy

Within 1 week of getting the A8 trans in my 2016 Z I realized I made a mistake and if I had it all over to do again I certainly would have gone with the M7, WAY funner to drive. Also, my A8 had a complete catastrophic failure 1 month ago and is finally going to be fixed this week as its been at the dealership getting a new trans and torque converter installed this past month and I have lost confidence in the durability of the A8 trans as my Z is bone stock.

That having been said I also thought the A8 trans. felt sluggish while driving normal and and unimpressed and very disappointed with the poor throttle response when driving the car normal when its not in boost. BUT, when you hit the go fast pedal looks out she's a rocket ship. its almost like its all or nothing at all with the A8 trans just like the old Sinatra song.

My input on all of this is probably a little bit skewed having come from a 600+HP 2009 Dodge Viper where I had all the n/aspirated torque down low with its 512 ci (8.4 liter) V10 engine and with its Tremec manual 6 speed I could put that baby in a lower gear and the low end grunt was always there. Definitely 2 different animals but I have to say my Viper was A LOT funner for me to drive and I knew for me I made a mistake when I traded in my 2009 Viper for new the Z06 with the auto tranny.

Mopar Jimmy

100%. Especially since my A8 tranny on my 2016 bone stock Z took a complete dump at 6,400 miles stranding me the roadway. Thank GOD for my warranty as the Vette is just about done now with a brand new A8 trans which has to be about an $8,000 repair with these cars and the labor cost.

b4i4getit

Minimal risk of failure ? I don't think ANY of the transmission tuners here will offer a warranty on what they do if your transmission fails. They won't replace your transmission like GM will do if you have a problem during the warranty period. It is a very costly thing to do.

0Terry@BMS

Right when you modify you assume the risk of fixing whatever breaks if your modification contributed to that failure. Also keep in mind to many of us the cost isn't really a big factor. If the car doesn't do what we want when we want it then its basically worthless. Others may have a different perspective. The great thing about modifications is if they are not for you then its easy not to install them.

BOBSZ06

TTT


Chuck? Anyone have this done?
Results?

2fastnow

Tremec in owned by a company in Singapore

davepl

How do you figure?

TREMEC is a wholly owned business unit of Grupo KUO, S.A.B. de C.V., a diversified manufacturer of automotive, chemical and food products. The company exports its products to over 70 countries and is headquartered in Mexico City, Mexico.

Are you saying that Mexican company, Grupo KUO, is in turn owned by a Singapore company?

jim2092

No accomplished tuners on this forum or others have mentioned any ability to eliminate the present lag after shifting when using the paddles. In fact some of them have said it is not possible now. Future expansions of tuning software "may" provide that opportunity.

2fastnow

I think I made a mistake, I was looking to see if a German ZF had anything to do with them...some how I got Koul group...

99HRDTP

LMAO, hardly an "elder" nor a grandpa, but I was being sincere about the Happy Thanksgiving (not a holiday that I f*ck with especially since I got to spend it here with my family instead of deployed to some God forsaken desert).

I understand your point, just not the smart *** manner in which it was made. I merely voiced an opinion, as is my right on this open forum, with the intent to parlay on the OP's original post, not troll. I could care less about getting into a discussion about DCT vs torque converter auto's. I am unhappy with the way the Z shifts and would relish a solution like Chuck's or hope that GM comes up with a software solution.

I don't recall us ever having an issue before, and I attempted to respond to your post in a civil manner, with my semi-rebuke at the end merely pointing out that my posting history and longevity on this board, should speak for itself with regards to questions of trolling or integrity.

I will leave it at that and not clutter this "good A8 tuning thread" with any more off topic back and forth banter between us. But, if you are ever in the area, I'd be happy to meet up over a beer and discuss cars and tuning all day long.

Unless, you've got a thing against drinking with a loser noob...

davepl