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post #1 of 16 (permalink) Old 11-23-2014, 09:25 PM Thread Starter
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What Kind of Fluid....

hey peoples....i have a 2008 cobalt LT 2.2L i have 123k miles on it...i am planning on doing a transmission flush soon... my question is what kind of transmission fluid should i buy? any recommendations or comments regarding a transmission flush and/or fluid to use....thank you!

---------- Post added at 09:25 PM ---------- Previous post was at 09:16 PM ----------

FORGOT!...to add...its an automatic :/ i know i know....
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post #2 of 16 (permalink) Old 11-23-2014, 11:37 PM
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Just go the the GM dealer and buy theirs, this is where you should pay for the namebrand. Forget the exact name but whatever the newest revision is.

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post #3 of 16 (permalink) Old 11-24-2014, 12:38 AM
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I just went to a tranny shop and got their synthetic fluid in mine. It's been working fine so far. If your gonna do it yourself I would get the gm fluid but if not I went the cheaper route. Most shops won't do it tho since its a sealed tranny.

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post #4 of 16 (permalink) Old 11-24-2014, 05:00 AM
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check the manual. It tells you there. and get a new seal and tranny filter

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post #5 of 16 (permalink) Old 11-24-2014, 05:50 AM
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My owner's manual recommends Dexron III ATF for the 5 speed transmission, however Dexron VI can be used which should be a superior quality product, and that's what I'm running in my F23. Since it's an ATF (automatic transmission fluid) I could only assume it'll be the same for the 4 speed autobox.

If you want to get a little more exotic, I hear good things about MT-90.

---------- Post added at 10:50 AM ---------- Previous post was at 10:48 AM ----------

The dealer should also install an extra magnet inside the casing. Not sure if it's a recall or not. Other members would know better.

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post #6 of 16 (permalink) Old 11-24-2014, 09:13 PM Thread Starter
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good lookin out guys! i did not get a cobalt manual with my car ...so i have clueless i am not going to do it myself...one of those things i rather have someone who knows exactly how/what to do, do it rather than myself...so dexron 6 is the way to go...i am going to check how much the dealership wants to charge me and if its reasonable ima let them do it...transmission filter any specific brand? and gasket as well? MT-90?? never herd of it; if its there ill take a look and plain jane would i have to request it or would it be something they do automatically...i remember the last transmission i did was on my navigator and they dropped the pan drained the torque converter and cleaned the pan and the magnet from little metal shavings...but i remember the fluid for that alone was $230ish! and labor was a little below 200 as well...should i expect that much on a cobalt as well?
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post #7 of 16 (permalink) Old 11-25-2014, 06:03 AM
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looks pretty easy IMO. check out this vid. thinking of doing it myself

https://www.youtube.com/watch?v=14jSdg6c-Xs

this is for a fluid change. not a complete flush

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Last edited by hailcesar75; 11-25-2014 at 06:06 AM.
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post #8 of 16 (permalink) Old 11-25-2014, 06:03 AM
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MT-90 is not related to GM and they won't carry it. It's from Redline and some people perfer it over Dexron. Athough now that I look at it, it doesn't mention anything about the automatic.

Red Line - Redline MT-90 Manual Trans Fluid #RDL-50304

I don't want to give you false information, I really don't know if they'll install the magnets without being told or if they would charge. All I know about the automatics is by what I've overheard people say. You'd likely need more oil in your auto transmission than in a manual, and thus expect to pay more, especially with a TC flush.

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post #9 of 16 (permalink) Old 11-25-2014, 06:05 AM
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heres the filter and gasket

Hastings® TF157 - Chevy Cobalt 2008 Automatic Transmission Filter

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post #10 of 16 (permalink) Old 11-25-2014, 09:53 PM Thread Starter
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good looking out guys! video does make it look easy but alot of steps to follow..i talked to two shops so far they did not wanna touch it; they said dealer. tommrow ima try one or two more shops if that fails i am going to get it done from the dealer...ill let you know how much it ran me and what type of fluid they used etc.
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