How Good is the Automatic Transmission? - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
Transmission All about the Chevy Cobalt Transmission

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post #1 of 14 (permalink) Old 04-28-2014, 11:17 PM Thread Starter
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How Good is the Automatic Transmission?

Basically im just wondering like is it durable?
Can it handle performance mods?
what can i do to insure i don't run into issues with it?

i own a 2006 chevy cobalt ls 2.2liter automatic

I want to put a new exhaust in aswell in the future supercharge / turbocharge

Please don't bash on my decision to do this to an automatic or to do it to a cobalt because its a slow car... i love my cobalt and plan on keeping it awhile its what i want to do and i wont be changing my mind

ive read a few places that i would need to upgrade my tranny? what do they mean when they say that?

ive also read on other forums that arnt specific to cobalts that i would be fine by just doing my performance mods

Thanks in advance for all the help, im pretty new and trying to learn quickly and that is why ive been asking alot of questions

Last edited by Coby7; 04-30-2014 at 08:19 AM.
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post #2 of 14 (permalink) Old 04-28-2014, 11:26 PM
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Yes you can mod an auto cobalt but the amount of power it can handle is still debated. Supposedly our trannys are rated for about 300 whp. but some say dont go over 230 and others are rocking 300 plus so there doesnt seem to be a solid answer.
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post #3 of 14 (permalink) Old 04-28-2014, 11:32 PM Thread Starter
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Yes you can mod an auto cobalt but the amount of power it can handle is still debated. Supposedly our trannys are rated for about 300 whp. but some say dont go over 230 and others are rocking 300 plus so there doesnt seem to be a solid answer.
what is the whp stock?
and the ppl with these mods are using STOCK AUTO TRANNY?
just clearifying cuz thats great news xD
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post #4 of 14 (permalink) Old 04-28-2014, 11:39 PM
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Most ppl seem to be running a tranny cooler with these numbers. Stock whp I think runs around 115-125. (Dont quote me on that) But hopefully someone will help clarify this information to you better because Im still learning as well haha

---------- Post added at 12:39 AM ---------- Previous post was at 12:38 AM ----------

Just beware because you will be making your tranny work a lot harder so you risk blowing it with higher numbers.
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post #5 of 14 (permalink) Old 04-28-2014, 11:44 PM Thread Starter
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hmmm where would i look to get a tranny cooler ebay best bet? also what are some things i can do to increase life of my tranny? and lastly my tranny i BELIEVE has never been replaced i could be wrong but im pretty sure, and im sitting at 108,000 miles should i think about replacing it? and how much does something like that cost?

I know im asking alot of questions but i really do appreciate your time and help
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post #6 of 14 (permalink) Old 04-28-2014, 11:52 PM
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You should be able to hit about 300 before you'll have serious issues. You'll need to build the engine long before you do the tranny but once the engine is built you will have to worry about the tranny in which case ZZP sells a built auto.

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post #7 of 14 (permalink) Old 04-28-2014, 11:59 PM
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What he said^ But your looking at thousands of dollars.... GM rates the max power at 315 hp but if you want your car to continue to be reliable down the road I wouldnt push your tranny. Im planning on eventually supercharging mine and Im not going to go past 250 because I still want my car to be reliable.
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post #8 of 14 (permalink) Old 04-29-2014, 04:35 AM
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4T45E holds up fine with a trans tune (faster shifts, more line pressure) and trans cooler.

I'm 4 years and 24000 on the turbo and no trans issues.

07 G5 GT

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272whp 276wtq @10psi
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post #9 of 14 (permalink) Old 04-29-2014, 04:58 AM Thread Starter
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4T45E holds up fine with a trans tune (faster shifts, more line pressure) and trans cooler.

I'm 4 years and 24000 on the turbo and no trans issues.
do you mind if i ask how much WHP youve been pushing for 4 years?
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post #10 of 14 (permalink) Old 04-29-2014, 05:21 AM
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Judging by his sig, I'd say 272 whp and 276 wtq @10psi. That seems conservative for a turbo built car.

Once you get around to the 240+ whp mark, internals will need to be worked on to safely keep it going.

'07 Eclipse GT build thread - 280whp, 254wtq
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