oklahoma

Numerous articles indicate that the A8 is identical in dimensions to the A6. So has anyone tried to or actually retrofitted the A8 into a C6? It would seem that the biggest challenge would be the computer control of the transmission and the possibility that the C6 PCM lacks that capacity to operate the A8. Perhaps Century or Rossi or one of the other vendors could comment. Any comments from subfloor@centurytrans would also be welcome.

RenoC6Z06

I'm interested. I hope the tcu is separate from the ecm.

Torquem

I may be smoking crack, but I believe someone posed this question before and the consensus was that it would not be possible due to tcu/ecm issues. I hope I am wrong though. Would be a neat mod.

el es tu

The trans ecu is separate of the main ecu and is located in the pan

If the dimensions are the same, the A8 could be retrofitted but would require some work to get the new trans ecu to communicate with the main ecu. It could just be a tech 2 job, or could require new wiring.

RPM transmission used to do swaps of A6s into manual cars; Id look to them for help first

ILLUSHN

schpenxel

Putting an A6 in an originally M6 car is a totally different ballgame since they actually came with those from the factory.

Unreal

One day when someone comes up with the software/adapters/wiring/interface it maybe possible. For now it is not until some aftermarket stuff comes out.

HOXXOH

If you start playing around with overall gear ratios, you'll see some advantages and disadvantages in 1/4 mile times when using available C6 axles with and without DR's. The first question becomes: Can you hook up with street tires on a GS? Next is: What's the average RPM in each gear over a 1/4 mile with mild boltons/tune and Dr's?
This is not just about having two more gears before you get to the OD ones.


Ratios Compared: 8L90 -- 6L80

First:------------- 4.56 ---- 4.03
Second:---------- 2.97 ---- 2.36
Third: ------------ 2.08 ----1.53
Fourth: ---------- 1.69 ---- 1.15
Fifth: ------------ 1.27 ----- 0.85
Sixth: ----------- 1.00 ----- 0.67
Seventh: -------- 0.85 ----- N/A
Eighth: ---------- 0.65 ----- N/A
Reverse: -------- 3.82 ----- 3.06
Axle ratio: 2.41 or 2.73 --- 2.56 or 2.73
C6 285/35R19 --------- 26.9 Dia
GS 325/30R19 --------- 26.7 Dia
DR 275/40R17 --------- 25.7 Dia

Telepierre

I have looked into this more than a year ago and re checked three months ago:

https://www.corvetteforum.com/forums...m5u-on-c6.html

The mechanical fitting is feasible but the electronics are still cost prohibitive (for my pockets). Buying an A8 with a controller for a C7 is actually fairly cheap approx. 4-5K. To modify the lot for the C6 is an R&D project none of the three names in transmissions I contacted seemed willing to take on. When I started talking dollars to fit a 3d party programmable controller 15K hardly seemed enough... so I to let that idea go for now BUT I would love to read any positive updates on the subject.

Cheers!

HecatesChild

(as I re-animate the dead with this reply)
Has any progress been made on replacing the A6 with an A8 in the C6 corvette?

NTACHNCE

Also want to see this happen! Would like an auto that can hold 1000whp for a little longer than a 4l65

C6VetteLover

The 4l65 wasn't used in the vette I don't belive, it think it was a 4l80 but only in 2005, 2006 changed to the 6L80.
You could have a 6L80 built to handle 1000 hp but you also will need a stronger rear diff and axles to go from 436 hp to 1000

Omega Doom

only in the 2005 year was the 4l60 used not the truck tranny 4l80

NTACHNCE

I’ve never heard of a long lasting 6L80 before at 1000+whp. If there is one I’d like to know where I can get the parts to build one. As of right now I’m planning on building a tr6060 because I’m a manual now but have been waiting for my t56 to blow up for the second time before putting in another trans. Diff and axles will be built as well obviously.

SteveJewels

I have a 4L65e in my 2010 Corvette.

Contract RPM Transmissions and ask about a Level 7 4L65e.

I am at 750 wheel, soon to be ~ 1,000.

NTACHNCE

Even a level 7 4l65 has to be rebuilt after about 5,000km at the 1000hp mark give or take pending driving habits. Don’t really want to go down that road. I was told that right from rpm. My car has an iron block so it’s not the lightest.