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Chevrolet Cobalt Transmission Issues

39 messages,  Last post on Oct 17, 2009 at 5:57 AM

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What is this discussion about? Chevrolet Cobalt, Transmission, Coupe, Sedan

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#10 of 39 08 trans fluid.....How do i change/fill it? by justinpe Nov 02, 2008 (7:31 pm)
I had my new 08 for less than a month and my wife ran over something on the way home. It bent bottom of Radiator up which pulled the metal from the plastic at the ends. Long story short.....I replaced the radiator but I know I lost a bit of tranny fluid in the swap. The 08 does not have a tranny stick and in the booklet it says the dealership has to do any tranny fluid changing or checking. Anybody have any ideas? I live over a hundred miles from my dealership and am real busy and do most of the maintainence on my own vehicles so I hope someone has an answer. Replies to this message: mojo_ryen (Nov 03, 2008 10:10 am) cmhj2000 (Nov 03, 2008 11:30 am) cmhj2000 (Nov 03, 2008 11:59 am)
#11 of 39 O8 trany fluid, where? by justinpe Nov 02, 2008 (7:57 pm)
I had my new 08 for less than a month and my wife ran over something on the way home. It bent bottom of Radiator up which pulled the metal from the plastic at the ends. Long story short.....I replaced the radiator but I know I lost a bit of tranny fluid in the swap. The 08 does not have a tranny stick and in the booklet it says the dealership has to do any tranny fluid changing or checking. Anybody have any ideas? I live over a hundred miles from my dealership and am real busy and do most of the maintainence on my own vehicles so I hope someone has an answer.
#12 of 39 Re: 08 trans fluid.....How do i change/fill it? [justinpe] by mojo_ryen Nov 03, 2008 (10:10 am)
Replying to: justinpe (Nov 02, 2008 7:31 pm) You can change it yourself, but it is very difficult. With the sealed transmission (no dipstick) the only real way to get the fluid level correct when refilling is to have the car on a lift so that the vehicle is level. Otherwise you could overfill it. I ran into this with a 2001 Malibu. I took the pan off, drained it and then went to refill it. I found the fill plug under the air intake, but no dipstick to see where the level was as I refilled it. Unfortunately unless you want to run the risk of either underfilling and burning up the transmission, or overfilling and blowing seals, you will need to take this to either the dealer or a service shop that is familiar with servicing sealed transmissions.
#13 of 39 Re: 08 trans fluid.....How do i change/fill it? [justinpe] by cmhj2000 Nov 03, 2008 (11:30 am)
Replying to: justinpe (Nov 02, 2008 7:31 pm) The 4T45E is filled thru the top of the transmission and on the drivers side. My 2007 LT has a black rubber plug on the fill area.   To check the level.   Locate the hex head plug near the pan, about 1.5" from the bottom of the transmission. This is the ATF level checking plug and is located near the passenger tire.   With the engine idling while the car is on a level surface, the ATF should be level with the plug hole. Also, the engine/transmission should be at normal operating temps to check proper ATF level.   WARNING!!!   With the engine off, removing the level check plug will drain about 3-4qts of ATF. Of course this feature could come in handy for those wishing to do some partial drain and fills.   I've done several of these and it's not as hard as some think or suggest. Replies to this message: cmhj2000 (Nov 03, 2008 11:59 am)
#14 of 39 Re: 08 trans fluid.....How do i change/fill it? [cmhj2000] by cmhj2000 Nov 03, 2008 (11:59 am)
Replying to: cmhj2000 (Nov 03, 2008 11:30 am) A Picture is worth 1,000 words. Can't post a pick here so,,,,,   In the photo section of this group is a picture of our auto tranny. Pretty simple once you know where everything is at and have the basis instructions, which I posted above..   http://autos.groups.yahoo.com/group/Lubricators-r-us/
#15 of 39 transmission by paperboy_1 Nov 04, 2008 (3:37 am)
the cobalt 2005 transmission is sealed, but , the transmission is equipped with an overflow screw, which basically means that if you over fill it, the overflow will just come out .. this is located on the back passenger side of the transmission..the overfill comes out and runs down onto the the pan where it drips onto the ground ( while the car is being driven) from there , so do not mistake a leaking pan for a simple overfill... btw the cobalt holds empty to full 7 quarts of trans fluid...if you over fill it , not to worry the excess will come out and stop when the correct fill level is achieved   also of course the book says take it to a dealer..gm and the dealers have teamed up on car repairs so the dealer can make more money by repeat visits..gm has designed the cobalt to be harder to work on on purpose   lastly, no need to go hunting down the overflow screw.. it releases the overflow automatically Replies to this message: poncho167 (Nov 11, 2008 8:14 am)
#16 of 39 Re: transmission [paperboy_1] by poncho167 Nov 11, 2008 (8:14 am)
Replying to: paperboy_1 (Nov 04, 2008 3:37 am) "..gm and the dealers have teamed up on car repairs so the dealer can make more money by repeat visits..gm has designed the cobalt to be harder to work on on purpose."   Sounds like most cars on the market nowadays.
#17 of 39 picture off tranny fill plug? by justinpe Nov 11, 2008 (6:38 pm)
I have a 2008 cobalt and need to add some tranny fluid and need to find the plug or what ever it is that will let me fill it. Does any one have, or can anyone take a pic. of their engine and put an arrow on it and say "this is the plug!" ? I replaced my radiator and need to top th tranny off.   Thanks
#18 of 39 picture by paperboy_1 Nov 12, 2008 (4:26 am)
the image is in the link::   http://img520.imageshack.us/my.php?image=cobalttransvu3.jpg   find the fuse box (driver side under the hood) standing in front of the car facing the engine (with the molded plastic shield taken off, (it is the one with the oil cap holding it on).go straight down beside the fuse box toward the transmission and you should be able to feel the cap about 12 to 16 inches down.. the cap maybe about one to 1 and a half inches wide.. it just screws on and off   the plug is hard to see, you will need to feel around for it, its not hard to find.. make sure the engine is cool also
#19 of 39 2006 cobalt transmission problem?? by cdn_shawty Apr 08, 2009 (2:05 pm)
Have had nothing but problems with my 06 cobalt since I got it. One of the problems I am experiencing now is possibly transmission but not sure? Someone suggested it may be... when I am down to 1/8 tank my RPM's start going insane jumping from 2-3-2-3-2 etc and my car jerks as if its going faster then slows down altho the speed isnt really affected. this has now happened 3 times but the 2nd time it happened my car actually stopped. i thought it was acting up so i was tryin to turn into a parking lot and rather then it still driving, my cars speed slowed down and luckily i made it in the driveway where my car stopped and would not move! i turned car off then turned on and it moved about 5 ft and had to do that several times before i could actually get in a parking spot and call my dad to bring me gas then it was fine however made this real loud noise while waiting for gas (fuel pump?). I've had nonstop problems with my gas gauge not reading accurately but before all this i was able to drive on empty no problem.. has anyone had these issues or know what it could possibly be? I've had 5 new fuel sensors put in my car and its still not fixed and all they say is nothing shows up on the scanner. I am in the middle of filing a complaint with CAMVAP in Canada which is like the lemon law. i am waiting for my hearing date to battle it out with GM... Never again do I buy GM!!! Please help if you have any advice! Thanks!

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