what years of the 4t40e will work for a no option 2003 sunfire eco? or possibly the 4t45e too?

'03 Sunfire 190k

does anybody know? i need to buy one as soon as possible. my car is starting to hang up in the middle of the 1-2 shift and 4th gear is shifting in too early and bogging down. the car has about 110k miles and i drive it 60miles a day, 365 days a year. i throw newspapers out of it.

'03 Sunfire 190k

if i get one that has 16 original miles, is it ok to use mobil1 synthetic atf? or whats the best atf to use when i install the transmission?

'03 Sunfire 190k

Basicly any car that had the 2.2L Eco you can use the trans
Saturn LS
grand am
alero
cavalier
sunfire




JBO since July 30, 2001

Use Mobil 1 Synthetic ATF. I wouldnt use anything else.

NOTa2_4 wrote:Basicly any car that had the 2.2L Eco you can use the trans
Saturn LS
grand am
alero
cavalier
sunfire

Not true, I just found a 2004 Grand Am 4T40E, I was oign to buy it and they said it will only work on a 04-05 J Body, I was like WTF??? WHY?

After calling and talking to a few Transmission shops, they informed me that the 04-05 4T40E tnasmissions have a completely different Vavle Body and harnesses. I then asked if I could just swap my Current Valve Body and harness to the New Transmission, They said at that point I would be dealing with re-building the trans itself.

Just make sure before you buy, there are ALOT of 4T40E transmissions out there, some fit 3100 V6 too, just make sure it is the right part number.

There are 4t40Es out there from 95-07 from 2.4s 2.2 eco and others.

The part number you need is: 400-04260, 4T40E, MN4, the part number for the 04-05 Cavaliers is: 400-04319

V6 4t40E's wont work then? got one down in the storage shed from a Malibu