: Question on the durability of the A6 transmissions with mods.



jguy
05-12-13, 10:29 PM
I am looking to purchase a V in the next month or so, and have been lurking here for sometime. I have read on here, and many other forums that the automatic is a weak link with mods. I love manual transmissions, but It is frustrating how much quicker the A6 cars run on the track (according to numerous articles I have read). Any input will be
greatly appreciated.

Jimmy

neuronbob
05-13-13, 06:59 AM
My understanding is that the auto transmission is pretty stout, and that you have to worry about breaking it above about 650 whp. Of course, IMHO and YMMV, etc.

On this car, 6AT failures are uncommon when the car in general is left stock.

I owned a 6AT 09 V and never had problems with it in the nearly four years I owned it.

V locity
05-13-13, 09:00 AM
They are Very Strong units. IMHO, The majority of failures or problems, roots in the tune.

There are guys pushing 1000rwhp through a tuned 100% stock trans & converter.

wait4me
05-13-13, 10:56 AM
You can always up the 3-5-r and the 4-5-6 guts and intermediate shaft. Those are the parts that usually die in high hp cars. I change those parts here at the shop often. It makes them a lot stronger. "unless another tuner sets something up wrong"...

jguy
05-13-13, 10:56 PM
Good info, thanks guys! I believe I will just go with either tranny depending on the best car I find.

nguyennhatquang
05-13-13, 11:05 PM
Very durable transmission...
only thing you should mod is the shift point...to make it shift faster.
it have a litte bit delay when u hit + or - button. I usually run car in Manual mode because it so fun to drive it as paddle shift mode.

i heard that trans is come from 3500 truck..so it should be very reliable because this car will not pull any trailer..

nguyennhatquang
05-13-13, 11:05 PM
Very durable transmission...
only thing you should mod is the shift point...to make it shift faster.
it have a litte bit delay when u hit + or - button. I usually run car in Manual mode because it so fun to drive it as paddle shift mode.

i heard that trans is come from 3500 truck..so it should be very reliable because this car will not pull any trailer..

stl_ls1gto
05-14-13, 09:19 AM
6l80e trans is used in the light duty 1500 trucks like my 6.2L sierra.....these cars have the 6l90e which is an upgraded trans rated for more torque. A transmission is never rated by horsepower, only by torque.

wait4me
05-14-13, 11:39 AM
6l90 was used in select trucks as well. Escalade I believe got one as well?

6l90e and 80 though do not have much internal differences. few more clutches, steels, and minor stuff..

PremierJosh
05-14-13, 11:07 PM
The 6l90 is amazing for a factory trans and a lot more than just shift points need adjusted when you start making some power. It also makes it drive so much better and run quicker et. You can get the shift times down to .2-.3. I have been spraying mine thru the shifts for many 10.58 - 10.8 runs. Trans temp and tuning are everything. Also a new 6l90 is $2600 from the dealer if you ever need one.

stl_ls1gto
05-16-13, 09:26 AM
6l90 was used in select trucks as well. Escalade I believe got one as well?

6l90e and 80 though do not have much internal differences. few more clutches, steels, and minor stuff..

nope, escalade and tahoe denali have the 6l80e as well. Only the HD trucks that dont have the Allison trans have the 6l90e

48548m
05-16-13, 10:46 AM
I think the durmax vans get them as well but they are detuned to save the 6l90e. I had a new 2011 ext and now have a 2012 sierra with dmax and Allison. Night and day from the 6l90e and Allison. But I didn't have issues with the ext(tranny wise) and my wife has a 6l80 in her g8 and it works fine in her car.

V locity
05-16-13, 10:59 PM
This should help ;)

http://gmpowertrain.com/Libraries/Product_information/2013_4FRev_Information_Guide_091012.sflb.ashx

wait4me
05-17-13, 04:32 PM
nope, escalade and tahoe denali have the 6l80e as well. Only the HD trucks that dont have the Allison trans have the 6l90e

Depending on years, I have seen them personally. Had one just the other week that was 6l90e. I know the difference..

A suburban is at the shop here right now with a 6.2L and 6l90e. I just double checked. It is a 2012