svrTc06

I have an Auto Trans, and i was wondering if there was any way to change how the trans shifts. i want to be able to change the torque management (term used for GM vehicles i dunno if its a universal term) on it so that it shifts a little harder instead of baby it into gear like it does now.

if i did the trans upgrade from ZPI would that do it?? has anyone done this?

Thanks
Dan

jrodTc

^^^ If you find out let me know. I am a boosted Auto and want to make some upgrades. ZPI is the only company that I know of that has upgrades for the tC auto tranny. i called a couple other racing shops that build performance tranny's but they haven't ventured into the tC arena yet. Hopefully they will. I'm hoping to have a 300WHP auto soon. It CAN be done.

svrTc06

do you have any trans problems, i heard that turboed autos have shifting problems. have you heard any of that?

how much did your kit cost, if you dont mind me askin? also what do u run in the 1/4?

jrodTc

No 1/4 #'s yet. I know But i'll get those soon. I'm putting 240 HP/TQ at the wheels currently and so far the tranny is holding good. I just bought a tranny cooler and am going to do the ZPI valve body upgrade as well, for longevity and so it will hold more power. i've heard 240 is about the limit for the stock tranny. anything over that and you'll notice it slipping. But I don't beat on my car at all really. So in Vac, it shifts great. Even in boost it goes through the gears without any issues. But I do for see a tranny build in the near future. I want to be the first tC on here putting down 350WHP on an auto!!

svrTc06

i think you will be, b/c the other guy that was building his auto up (318_tC i think) gave up and converted to manual.

put up a post when you get the ZPI Trans rebuild done, cuz im interested in doing it too, but im not looking for it to hold n e more power, i just want it to accellerate quicker due to the quicker shift times.

thanx for the help, keep me posted.

1slowtc

i have no idea what i am laying down on a dyno but i have the stage 0 from zpi and a auto next couple of weeks i should have the tranny done at the track i spun to the 60 foot launch at 3 psi when i hit 3800 i sprayed a 75 shot car bouced off the rev limiter in 1st and 2nd but i ran a 13.66 at 104 and some change in the 1/4 on my stock tires set at 30 psi

1slowtc

trans upgrade and some slicks i am going to try and launch at 6 psi and a 75 shot and see where that takes me have all the parts just missing the fmic to jump to a stage 1

jrodTc

What upgrades are you doing to the transmission?

1slowtc

zpi valve body, and new clutch discs zpi said that they are working on a converter but i haven't heard from them so i got one form the juck shack and took it a a trans shop here in slower lower delaware. they said they should let me no something in a week or 2 just got it to them today so if they can do something i will let you no.