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Transmission All about the Chevy Cobalt Transmission

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post #1 of 83 (permalink) Old 01-05-2008, 07:58 AM Thread Starter
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Chevy Cobalt Auto Trans

Hydra-Matic 4T45E

Specifications
Type: four-speed front-wheel-drive, electronically controlled, automatic overdrive transaxle with electronically controlled torque converter clutch.

Engine Range: 2.2L-3.5L


Max Gearbox Torque:
325 lb.-ft.


Weight:
188 lbs.

Assembly Site: Windsor, Ontario

Applications: Chevrolet: Cobalt, Malibu, Pontiac: G5, G6, Saturn Aura, Vue 4-Cylinder



Source: GMinsidenews.com


Last edited by nugz; 01-26-2008 at 06:00 AM.
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post #2 of 83 (permalink) Old 01-05-2008, 11:39 AM
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what is the difference between the 4T40E/4T45E if there is any? how do I know which one I've got?

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post #3 of 83 (permalink) Old 01-05-2008, 04:50 PM
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According to the factory service manuals all auto Cobalts have the 4T45E version. Don't know the difference....

LS/LT 2.2 autos have 3.63:1 final drive ratio (38/34 tooth chain drive, 3.05 gearing)
SS 2.4 autos have 3.91:1 final drive ratio (38/34 tooth chain drive, 3.29 gearing)

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post #4 of 83 (permalink) Old 01-25-2008, 07:38 PM
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How much power can the 05 LS auto tranny hold? Is it a reliable trans?
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post #5 of 83 (permalink) Old 01-26-2008, 02:09 AM
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read the sheet. 325 lbs/ft of torque
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post #6 of 83 (permalink) Old 02-13-2009, 01:34 AM
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Hypothetically say I have the Auto and want a Manual. I don't care if it's a Cobalt tranny or not, i just want a Manual. Anybody done a swap or know where there's a write up on one?
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post #7 of 83 (permalink) Old 02-13-2009, 03:28 AM
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go buy another car !

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post #8 of 83 (permalink) Old 02-13-2009, 06:34 AM
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Quote:
Originally Posted by MM3Rambow View Post
Hypothetically say I have the Auto and want a Manual. I don't care if it's a Cobalt tranny or not, i just want a Manual. Anybody done a swap or know where there's a write up on one?
Not worth the effort...obviously it can be done physically since the Cobalt comes with both. You would need to redo the computers and wiring (this is the part that is not easy to do unless you have a COMPLETE donor car), R+R all the shift mechanisms, add clutch hardware/system, replace the engine mount/tranny mounts, and replace the Exhaust Downpipe.

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post #9 of 83 (permalink) Old 02-13-2009, 01:40 PM
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The reason i want to put a manual in is because the acceleration sucks. How can i fix that since a tranny swap is out of the question for my budget, time and skill level?
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post #10 of 83 (permalink) Old 02-13-2009, 02:02 PM
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I'd say a tune, maybe the Trifecta.



RIP Cobalt Totaled Sept. 2011
Current Car 2011 WRX

Project Victory_Red_SS Keep the dream alive.
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